Underrated hack thats has 3x my productivity this year. 

I call it the 10-minute rule. I set a 10-minute timer on my watch for whatever my next task is so every 10 mins during my current task i get a reminder that i still have another task. I keep track of how many 10-minute timers go off and I was shocked at the dead air / dead space i waste. 

The goal now is any tasks i do is done within 5 10min timers.