The 2-minute rule.
The MOST UNDER-RATED productivity hack ever!

If something takes less than 2-mins to get done, get it done right away.
Postponing them only adds to the cognitive load our mind had to bear with.
Our brains will think we still have a LOT to do.
Feeling burdened and overwhelmed.

Get the small things done quickly.
It will eventually get the big things done :)