This is really important. You can't actually absorb information at high effectiveness for more than 4 hours / day. So you spend the other time doing things that

This is really important. You can't actually absorb information at high effectiveness for more than 4 hours / day. So you spend the other time doing things that rest your brain. I would add that 20 minute naps after absorbing material are proven to aid learning. Midafternoon is a good time. Set a timer and don't go over.