Anything that causes you to overreact or underreact can control you, and often does.
If you don't pay appropriate attention to what has your attention, it will take more of your attention than it deserves.
If the only tool you have is a hammer, it's hard to eat spaghetti.
There are no interruptions, only mismanaged inputs
The hardest thing about being productive is not the work, but the split second it takes to decide to take control.
'I need milk' and 'I need to decide whether to buy this company' both tie up space in psychic RAM. The solution is simple. Write it down. Look at it. Do it or say to yourself 'not now'.