Most Carnivorous Plants (CP) are not that hard to grow. The recipe is pretty basic and fairly consistent across most CP, but not all. There are exceptions within almost every Genus. Remember though, all plants die, sometimes for no reason.
Water:
This is consistent. All must have pure water. Reverse Osmosis (RO) or distilled is best, unless you have very, very good water. And even then, I would advise changing it and flushing the pots regularly. If it's RO water, you probably don't have to bother. Go to my TDS map and see if the Total Dissolved Solids coming out of the tap in your area is ok to use from the tap. (The map was created in December 2007 and will take a while for people to put their readings in, so be patient.)
Humidity:
Most CP don't like it dry. However, you have to check each CP for its' preferences. Some are from very arid places. Only a VERY few are from extremely humid places and will not tolerate anything much below 95% humidity. Fortunately there are many, many CP that can take typical outside conditions. It is a myth that they all need high humidity
Soil:
Consistent across all the CP I know is the need for low nutrient soil, although I've been reading of some rare, in cultivation plants that seem to grow in soil in their native habitat that I would expect to have more nutrients than they typical soil recipe I use.
In general, a mix of 1 part milled peat moss and 1 part coarse sand is the base material for most CP collections for everything but Nepenthes. I only grow a few Nepenthes so I'm going to suggest you go elsewhere for recommendations on them.
Light:
Most like a lot of sun, but there are more than a handful that like part shade, especially when it's hot. Again, there are always exceptions. So look up your plants here or elsewhere on the web for more precise information on the plant you have.
Temperature:
This one is all over the map. In general, I think most of the plants can tolerate more extreme temperatures than much of the literature suggest. But I've killed more than I care for in a cold snap in the San Francisco Bay area.
Wrap up:
Many of these plants have not been taken to the extreme of their tolerance. They are too rare in cultivation for much experimenting. If you really like a plant, and want to try it in situations other than what people suggest, I recommend giving it a shot. I've found a lot of Drosera that are surviving 28 degree temps in the winter that I would not have suspected could survive. If it's rare, try to propagate some plants through leaf cuttings or seeds to experiment on though.
