Fighting pests in your basement is a little different because of the variety of creepy crawlies you can find down there. Most of the action is going to be centered around the spiders, because they kill so many other insects. Despite their reputation, spiders are great to have around so consider relocating them into your yard instead of killing them and watch your pest population shrink.
If you have an unfinished basement, you might want to let the spiders stay and do their thing -- just keep an eye out for black widows and other venomous spiders. Destructive termites are something to be aware of in your basement as well as fleas and ticks which usually hitch a ride in on some kind of rodent.