Things vary daily with my 16 month old, as she is getting molars and everything seems to be changing SO fast. But, unless we are out all day, I try to incorporate these things into each day:
I read her a book, then she reads it to me.
Fabric play- with clothing, scarves, sheets, or cloth napkins. She plays a mean game of peekaboo.
Water play- either in the kiddie pool, at the public pool, in the creek, or in the sink. (no bathtub)
Food play- Helping mommy stir something, raking chopped vegetables into a pan, right now she is playing with beets like stamps on paper (except its on the hardwood floor)
Music time- aka, mommy cleaning the kitchen while baby dances around and screams the songs to the top of her lungs.
Working in the kitchen- I have a box of lids: mason jar rings, tupperware lids, pickle jar lids, ect. She scoots them around on the floor and plays with them.
Typing time- I type everyday, so I always try to let her do it for awhile too. DH thinks this is the reason some of our programs dont work the way they used to.

Magazine ripping time- she has a basket of magazines that she rips the pages out of and brings them to me.
We also go outside and water plants, run errands (she loves to give the credit card to the lady at rite aid), play in the dirt, jump around in the laundry, take showers, and try to poop on the potty

We're busy. No wonder I can never seem to get anything done.