I have a certified backyard habitat, which means I like to try to attract birds and butterflies and I try to tolerate the other critters we get in the yard. We put up several bird feeders and a heated birdbath for our feathered friends, which we are particularly careful about filling during the winter. Recently I tried out a Kaytee sock filled with nyger seed for the goldfinches. I had previously offered the seed in a regular thistle feeder, which got some traffic. Wow, those socks are AWESOME (except for the serious drawback that for some reason they seem to drop a bunch of seed at about the halfway point - need to figure out what is causing that).
Remember that old commercial about how "they'll tell two friends and then they'll tell two friends and so on..."? :)