Sticky traps, spray pesticide around the foundation, and natural stuff inside. Get more cats.
@topcat: We have a cat just for that reason - to get rid of spiders and roaches. Apparently this cat has decided he's too good for the small stuff as he ignores spiders and roaches and instead brings us stuff like squirrels, rats and snakes that he finds in the woods. I'm just waiting for him to drag a raccoon to the back door for us. We ended up getting an exterminator. He does not spray inside the house but does the yard every 3 months. It greatly reduced the number of spiders and roaches around - and in - the house.
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