Maggots
An old fashion way to attract bluegills to a particular spot, is to collect a piece of fresh roadkill. Bluegills aren't particular, so any dead animal will do. Nail the carcass to a tree, right above the water. Since bluegills travel in large schools, the rotting carcass will collect maggots and drip into the water, and the fish will be attracted to the area. It might not be the nicest way to attract fish, but it works. You can also use the maggots on the end of a hook to catch a bluegill.
Earthworms
Earthworms are also known as night crawlers or blood worms and bluegills love them. You should be able to find them at a local bait store. Earthworms are lightweight, cheap and they last for quite a long time. Or catch your own by shining a flashlight on rich soil, during the night when they are above ground. If you place them in a coffee can that has both ends opened and sealed with a plastic cap, getting the worms out of the can will be easier, because you can get into each end.
Insects
Crickets and grasshoppers also make a good bait to attract bluegills. You should be able to purchase them at your local bait store, if you can't catch your own. If you get a hit off your bait, or catch one bluegill, you can be assured there's more waiting where it came from. Since bluegills congregate in numbers, catch one and you're sure to catch another.
