This is another thing I've been exploring, but I haven't had a whole lot of luck in actually slowing down time.

The "fix" seems to be:

- Add more activities to your day, every day.

- Try to break up routines. Eg. you may run every day, but you don't have to take the same route.

- Be actually present during those activities. Engage in conscious thought about those activities.

- Take photos, videos, recordings to recall those activities and jog the brain.

I bet you can even accomplish some of this retroactively with the right group of friends. The question "What did you do this weekend?" can be answered in so many levels of detail.