breeding the zoo (expand your bestiary)
you can expand your bestiary quite easily. Just go into the next toy store and buy some plastic animals. There are loads of plastic beasts about 1"-4" in size, which is ideal. Just buy 'em, paint 'em and play 'em. Examples for this strategy can be found in the rules section.
Another great way to increase the number of possible opponents is to use other miniatures you have. Most fantasy miniatures will look just fine and also many of the SciFi- minis. To create a set of rules I normally proceed as follows...

I. choose one existing set of rules (e.g. the rules for the whip wine are a spin- off of the lashworm rules, Ghârm Dhûron is kind of a step brother to Karloth Valois)
II. adapt these rules to your flavour (e.g. a plant won't hide in a fissure)
III. adjust the rating according to the changes you've made (is it harder to kill, tougher, or slower)
IV. present the rules to your gaming group / opponent and check if all players agree with them. If not, change them accordingly. If everybody agrees, game on

unearth your own underhive (constructing buildings)
You can easily construct your own buildings, either by following one of the zillions of advices on the web, by painting your cereals boxes or by using the ingenious STC (standard template construct) of the card bulkhead. These are downloadable at the maps page.
if you want use these, or make your own, here a few hints (I advise reading this through before trying to construct the STC):

- print the bulkheads on (approx.) 160 g/ m² paper or they won't be very stable
- print the platforms and bridges on paper and stick them onto thick cardboard or they will warp easily
- when glueing together bulkheads, roughly cut out the parts; the door and the triangular shapes on middle, front & back have to be cut out exactly, preferably with a sharp cutting knife !attention with the knifes, cut away from your body!, glue the front to the middle, fold the buttresses to the printed side (outside), glue on the back, fold the back- buttresses outside, glue on sides and top / bottom and finally (really the last thing to do) cut of the excess on sides, top & bottom.

fighting the green (making vegetation)
I evolved a liking for making vegetation only a few months ago. There are literally hundreds of ways to so it, but there's one I like best. With this technique, I already planted wire weed, whip wine, two willows and more (see pics)

I take garden wire (can be bought nearly everywhere, is cheap) and spiral it around something, depending on what you want to achieve:
wooden BBQ- sticks are ideal for wire weed, pens are good for trees, etc. I chose about 10 turns of the spiral for short branches, about 20 for longer ones or the trees
cut off your new spiral, but leave about 3" of untwisted wire at one end. repeat this procedure until you have enough spirals for one plant (about 5 for small plants, up to 40 for bigger trees and the like)
align all spiral so that the untwisted wire is parallel and... twist. you could either twist all the wires in one direction or you could intertwine them to represent gnarly trunks or... don't forget to leave 1"- 2" of wire untwisted for the roots. these are bent outward and glued onto the base
you should now have a nice bouquet of spirals. now, bend the spirals, twist them, pull them to the length you want them in, i.e. shape them. if you need help or inspiration, refer to the pics section
if you want to make something like the whip wine, twist some wire -which isn't spiralled- into the trunk
when done with the rough shape, glue your plant onto a base and bend it to your will
now, the plant can be painted whatever colour you want

cruising the wastes (vehicle construction)
It is really easy to get vehicles into Necromunda. You could convert Gangers to sit on Ork bikes, use any other 40k vehicle and convert (e.g. a Chimera for Arbitrators). You could also use our APC rules and template to bring driving closer to your gang.

choosing the location what to remember during setup
when setting up the landscape for a battle, some things should be kept in mind:

* is it a specific territory of a player? if so, which things belong there (e.g. mine working should include some kind of mine)?
* when both players are allowed to place terrain, keep your gang in mind (close combat gangs need cover to advance, shooting gangs don't, etc.)
* regardless of your gang, place loads of small cover. why? well, a building is great, but a model can barely hide behind a bulkhead. so you'll need barricades, buttresses, etc. also lower your view to the models level. check lines of fire at ground level, there should be no line of fire longer than half the board, or the Heavies are going to dominate the battlefield (my Heavy Stubber once shot down half the opposing gang)
* which area of the underhive do you represent? are there high buildings in the middle of a settlement, or are you near the wastes with one storey max?
* interconnect your buildings. this doesn't only create a real "underhive" feeling, but also ensures you're not going to get stranded because of some treacherous condition. you never know, will there be a layer of dust, a vengeful Arbitrator...
* leave enough space. there are two important things to remember relating to the space: you need to be able to reach your models even in the deepest underhive (rulers are great for pushing minis), you won't be able to snap even the smallest shot if you cannot see your opponent at all

field advice what to remember during a fight
in the heat of a fight, things can get messy. there are a few things, which you shouldn't mess up, though

* never forget your gang´s skills...
* never send just one ganger to do a job, your chances of failure rise...
* equip your (long-range) heavy with a clip harness (it´s common, only 10 creds and can save his (her) life...
* try to divide your gang into tactical groups, each with a specific task (don't forget the skills). stick to the task...
* evade opposing gangers you know to be hard, try picking the weaker ones to force your opponent to take bottle rolls...
* regularily re- arm your gang, i.e. check the skills of each model and arm it accordingly (combat skills / high WS = hth weapons; shooting skills / high BS = long- ranged weapons; etc.)
* don't worry about dying fighters, they'll be replaced by something even more intriguing, that way you'll never get bored with your gang and your rating stays low. also try throwing out heavily injured gangers (I think more than 3 negative effects are too much)
* it may even prove useful to throw out Gangers which started as Gangers since their cost is higher than for starting juves. be careful though, that the juves you keep have got some stat increases and not only skills
* do it your way, i.e. if some rule doesn't suit you, skip it or change it. as long as all players agree, play as you want it played