ORIGINAL: Matt / PA
One thing I will add....maybe it's in there already somewhere?
Unless you have resorted to a last ditch effort "Body Search" where you can use all the manpower you can get, resist the urge to bring everyone and their grandmother in with you to track your animal!
Tracking is best done IMO with 2 people who know what the heck they are doing. 3 or more people does nothing on a bloodtrail but get people in a rush, off the trail and sign possibly mixed up, disturbed or lost entirely.
Call that one other guy you can count on to go slow and work with you as a teammate on the trail andTHEN call everyone else after you've either found him, or exhausted every effort to find the animal yourself and you need to grid search.
Next to Rob's original post, I think this is probably the next best piece of advice. I remember tracking a deer several years ago during gun season. I was following behind a larger group of people who were "tracking", they obviously weren't looking hard enough/moving too fast because the blood veered away at 60 degree angle from their path and they would have never found that deer had I not been there and pointed everyone in the direction the deer actually went. And by the number of carcasses I've come across while hunting reinforces that fact to me because a lot of hunting in my area happens as a good sized group/family.