Take a big glass and catch them by putting it over them... Then slide a stiff card under the glass and now you have the spider in the glass... Now take said spider out and release him or her...

For spiders that aren't on the floor where you can catch 'um they will usually get on the end of a yard stick if you hold it close to them and then you can take 'um outside to release...

Smaller spiders you can gently pick up with a Kleenex and take out...

Killing spiders is bad karma so try to relocate them...

BTW, spiders eat insects so if they are in your house they are there fro a purpose...

B~