IMO you should be:
reading daily and discussing what you read.
You should be encouraging vocabulary development, by using rich vocabulary yourself and having conversations often with your child.
Working on large motor skills, coordination, and playing outside as often as you can.
Work on small motor skills in a fun, for your child, way. cutting, tearing, sewing, tracing, mazes, dot-to-dots, clay, etc.
exploring nature in your environment, even if all you have is ants in a sidewalk crack.
Encourage self help/basic hygiene skills
Give them access to art supplies
Involve them in your day. Let them help cook, pick items out at the grocery store, match socks, etc.
Play with words and letters, come up with silly rhymes, play letter/sound eye spy, etc.
Limit media and provide quality toys (lego, puzzles, blocks, dress ups, play mobile, etc)