I hate it when I find one of these in the house (like I did today). Sorry for the bad pic but I didn't want to get too close.
Even though I don't like spiders and bugs, I don't like to kill them either. So I use my very own design Spider Catcher - a real high tech gadget!! to catch them. Cut the bottom off of a large plastic bottle (the bigger the bottle, the further away from the spider you can stay!) - keep the cap tightly screwed on.
To catch a spider, hold the cap end and place the bottle over the spider. Slide a piece of cardboard under the cut off end and your spider should be safely inside.
Release the spider outside. Result - one happy spider instead of a dead one!