I do what wet spot recommends, or maybe it's a variation of it at this point - float bag x 10 min, then add a half cup of my tank water to the bag every 10 min for a total time of an hour. Depending on the fish, I dump out most of the bag water into a bowl, and either release the fish with minimal bag water into the tank (most often) or dump them into a net and then put in the tank.
That being said.... I don't get shipped fish, I pick them up from the store.
Whomever you order fish from will have instructions for you. Drip acclimating isn't really necessary in my personal opinion for freshwater unless you're getting some really sensitive fish. Some people swear by it though.
Others will say that a fish that is shipped and already stressed out and in a bunch of ammonia in their bag should get out of that bag pretty quickly.
So yeah. Just to confuse you. LOL
You should though have tank lights off when they're in the bag and for at least a few hours if not the remainder of the day for new fish. It helps them settle with less stress.