Prep the beds.
Remove winter mulch or, if well composted, work into the top layer of the soil. Work in some leaf mold or well-rotted manure, too.
Now is the time to trim fruit trees if you didn't prune in winter. Prune before buds begin to break into bloom or you'll stress the tree and get a tiny crop (or possibly none).
Perform basic maintenance.
Check stonework for frost heaves. Check and clean the deck now so you don't have to do it later; make any repairs.
Start seeds indoors.
You've spent the winter reading seed and plant catalogs, so try some.
Hardy vegetables, such as onions, potatoes, artichokes, and some lettuces, should be planted now.
Before plants have begun spring growth is a good time to divide many perennials. Share some divisions with your friends this year.
Build new flower beds.
This year, install complementary shrubs offering blooms throughout the season.
Stop feeding the birds.
Take down and clean feeders, put them away until fall.
Enjoy the spring show.
Resolve to plant more spring-flowering bulbs next fall.
Plant hardy annuals.
Sow seeds outdoors or transplant seedlings.
If you mulch now, you'll have next-to-no weeding come summer.
Deadhead bulbs. Remove spent blossoms from spring-flowering bulbs; let foliage die back without removing it.
Go shopping. Pick out flats of your favorite bedding plants; remember to pick ones not yet in bloom for stronger plants.
Prune spring-flowering shrubs. Trim away spent blooms, and thin too-thick branches to rejuvenate older plants.