I have left a lot of apples on the ground and the blackbirds love them. My garden visitors have also been fed cold cooked rice, mashed potato, left over Christmas cake and pud as well as proprietory bird feed, bird peanuts (not the sort designated for humans) and a fat/insect block. Apart from the apples, all on a med/small bird table. The nut feeders and fat block hang from hooks on the corners.
Note for any UK birders - don't forget: this weekend is the RSPB's Big Garden Birdwatch.