I used to play Counterstrike competitively, and it's become commonly known that pre-match routines can help a lot with consistency. Often something as simple as warming up for 30 minutes in an offline server with bots.

Some of the benefits are physical, you're literally warming up the muscles in your hand and arm, but it also has psychological benefits. If for instance you're nervous about the upcoming match, going through the warmup puts your mind in a context of "alright, we've done this a thousand times before, nothing new, just got to go through the motions". It also removes noise from your mind as your attention is going into the warmup instead of overthinking the task ahead.

I think there's a predictive phenomenon in the brain which primes us for activities when the precursors are present. For instance, working at home versus at the office - my experience has been that the simple act of physically going to the office puts me in a better emotional state to get to work than staying at home, almost like during that process it's killed the tasks associated with home and booted up the ones associated with work.