Changing activity is good for making mind fresh.
Prepare for a topic hour is even giving better focus in some cases. Especially when you have to go in meeting or reply or do certain task, or for certaine events, etc..
Sample hours:
Before sleep
Watching Moveie (Decide perspectives)
Company Meeting (Ready with agenda and work done and work to be done)
Walking ( Where to walk etc, what to do)..
ie.. Focus is on making that hour more meaningful.
