In no particular order
Stand up straight.
Sit up straighter.
Spend uninterrupted time thinking.
Make connections.
Listen better.
Share more.
Explain the why.
Carry a book at all times.
Drink less.
Carry a notebook at all times.
Write down everything.
Make lists.
Cross things out.
Draw pictures.
Make more time for others.
Make more room for others.
Make things — in collaboration with others — that didn’t exist before.
Remember that maintenance is also productivity.