Just learn to take every opportunity to move.
Park your car a little further away. Take the stairs to the office. Bike to work. Jog to your girlfriend’s house. Walk your dog after dinner. Take that stand-up paddle boarding class you always wanted to do or try that new yoga studio your friend keeps bugging you about. Wake up an hour earlier to use the gym your office provides. Or use your lunch break to pump some iron (you don’t need a whole hour to eat a sandwich).
No need for tracking or quantifying. It doesn’t matter what the activity is, just decide to move with every possible chance you get.
Squeeze a few minute here and a few minutes there out of your day, and overtime the seemingly small and insignificant daily micro-decisions made are no longer small or insignificant.
[Objects in motion stay in motion.]