Assess areas which need plants.
Finish your seed list.
Chores and Maintenance:
Check on plant protection; add mulch and adjust plant stakes as necessary.
Inspect ornamental trees and shrubs for damage.
Be careful with the use of salt to melt snow as it is toxic to most plants
Keep birds happy and fill feeders.
Continue to prune away damaged branches promptly.
Prune summer and fall-blooming shrubs.
Take cuttings of indoor plants now to use as for planting in late
Sow seeds of annuals which require a long growing season.
Mist houseplants often to provide humidity.
Move indoor plants away from windows on very cold nights.
Clean leaves of large and smooth-leaved houseplants.
Inspect houseplants for insect pests. Remove insects by hand and spray with insecticidal soap as necessary