Of course you can apply the same guideline for mind preparation.
Preparing your mind means getting rid of undigested emotions, extra stress or limiting beliefs.
You learn to relax, can practice some simple meditation techniques or simply take some time to distress in nature.
All these harmonizing activities are powerful.
The goal is to make sure that your mind is truly your best ally.
If you walk around with negative self limiting beliefs, this becomes a permanent burden which drains your energy.
This is the last thing you want.
Harmonizing and empowering the mind is again a vast topic.
Check this link for more resources on this: