I have some success with the TM technique, some days I'm just drained and don't want to do anything and after 20 minutes of TM in the afternoon I spring up and engage in hobbies or social activities as if it was a new day. It's better than a nap, which just gets rid of the heavy bodied tiredness. I also tried mindfulness before but I feel I get kinda like the creativity boost but not the rested state.
Transcendental Meditation. It's a more passive way of meditation than mindfulness that was kinda like a big I thing I think in the 70s or something? A lot of rich people are into it, most notable David Lynch and I think Jim Carrey... they have good marketing and it's kinda expensive if you are on a high earning bracket but of the woo woo weird things I spent money on it's one I don't regret.