Hey man, Im not an expert, but Im just reinforcing the idea to look, and look HARD.

I don't know if you read my post or not earlier "First Bow Kill, Thanks...."

http://www.huntingnet.com/forum/tm.aspx?m=3078574

I looked for my deer for 11 hours total, never found a single drop of blood. The fact is I KNEW I hit my deer though, I saw the arrow.

But when you go look for them, look until you can't look anymore, and then look some more. Especially look around water or any place you think that deer may feel secure.