Coming back to this worm thread to say that last year I was bemoaning (somewhere haha) the lack of worms here (it was my first year gardening and composting here) and that now there are worms everywhere.
I do compost coffee grounds and sometimes also "compost in place" -- put them right into the beds along with some other kitchen waste. Can't do too much of that as my housemate wouldn't like it but it sure does help the soil.
I also collected huge numbers of leaves last fall, and had one whole side of the yard ranked with big plastic garbage bags full of leaves. Most of those are used now as mulch and have been used in the compost as well. I have one bag left.
And everywhere I dig there are worms.