You may have already heard about this, but WorshipTogether.com is giving away free sheet music on their website every week. You can't do much with it at church without a CCLI license, but so far in the two weeks I've been a member, they've offered three free songs each week. That's going to add up pretty fast, and it's a lot cheaper than going out and buying more songbooks for your worship team. Plus, it's an easy way to stay updated on what's out there in new worship music. You have to "become a member" to access the music, but that's free too.