"Never Touch It Twice" Rule

The goal is to do it every day (if possible) but if you miss a day, you must do the habit the following day.

Pros:

• Easier to keep up for longer stretches with harder habits.
• Easier to handle on an irregular schedule.

Cons:

Once you've got the flow of email reduced to messages that matter, it's time to clear the non-urgent out of your inbox.

• Reply if a very quick reply is possible, like Thanks or Great or On it.

Research shows that people with more education have a greater cognitive reserve and this works as a protection in the face of mental decline.

But there's a twist to it: educated people tend to get Alzheimer's at a later age but once they get it, they're getting it at a higher load of the di...