Prepare this by mixing four parts water to one part sugar and bringing to a boil. Allow this to cool before pouring it into your hummingbird feeder. Woodpeckers, chickadees, titmice, and nuthatches all enjoy suet. You can hang this in a mesh bag, but it won't be as protected from raccoons that might help themselves. You may wish to consider purchasing a sturdy suet feeder.
Oranges are a favorite with orioles.
Wild Birds Unlimited offers all kinds of seeds for your feeders. They're also happy to answer any further questions you may have about bird feeding.