Purpose:
This drill is intended to make you more consciously aware of your own movements
Where: wherever you like
This drill can be done in any environment on any hold types. That means, you can select holds/wall angles that suit you to allow a little more enjoyment.
When: during the Learning Window
Climbs should be easy enough to allow thought process but not so easy as the drill feels contrived.

The Drill:
Select and climb a boulder problem.
Now repeat the same problem but this time, change something. What you change is entirely up to you with no limitations or suggestions. All it has to be is changing something compared to the first time.
NOTE: This drill is often best done in pairs, with someone else there to identify and highlight what you have changed. If you do not have a partner but are struggling, considering filming your ascents
Variation: repeat the same boulder problem multiple times, changing something new each time
The Outcome: How do you know when it’s working?
Over time, you should find that you become more aware of your movements. You should also find that your ability to recall a sequence after it is completed begins to improve.
This drill should help you to develop the ability to make conscious decisions in your climbing and to find alternative beta both in preparation for another attempt at a climb or in the moment while on the climb