RBG, as I was reading your reply, I was formulating my comment: "Ah, you've done this before, I see...
" but you beat me to the clever remark
I hand mix BOSS, thistle, and safflower, which attracts cardinals, left over Chinese fried wanton appetizers, and home grown striped sunflower seeds.
A separate finch feeder ALWAYS brings in the beautiful Goldfinches. If I haven't seen them in a while, I just have to top up the feeder with thistle seeds and they come zeroing in.
Bird feeders provide the harried adults a quick fast-food stop, while the babies keep up the constant "backseat" clamor. (Sound familiar?)
A water feature withe some kind of trickling sound definitely attracts the birds. But robins will bath in anything, even turned over metal trashcan lid... or a rice paddy.
I plant a lot of berry-bearing trees and shrubs to attract the berry feeders that won't come to a seed feeder (Robins, Catbirds, Mockingbirds, which also occasionally nets me a glimpse of orioles and bluebirds, though there are specialty feeders designed to attract them) The small acorns of the Willow Oak brings the Blue Jays -- they're excluded from the wire caged seed feeder. Nuthatches, Titmouse, and Chickadees, Downy Woodpecker, and Red Bellied Woodpeckers are other birds that nest in the woods behind my property and come to the feeder, though Chickadees will occasionally nest in one of the bird houses.
Other rarer but occasionally seen birds include Kinglets and Warblers.
Setting out bird houses usually brings in wrens. Though not as desirable, house sparrows will also almost always occupy a nest box.