You've probably heard this before. Repeatedly. On the school football team from the coach, in a post-match interview or on some inspirational poster. The premise is simple: the habits you form during training will manifest in the big game, for better or worse.
We believe this is just as relevant for development. When we've got a lot on the temptation can be big to cut a corner here and there. The reasoning goes: it's only a small change - what's the worst that could happen?
If you follow the Code Style for even the smallest changes, the whole project will have beautiful code. If you review a quick hotfix with the same care as a full release not only are you more likely to catch issues with the hotfix itself, but your natural tendency will be to follow the right process for the big go-live.
Make the investment to build the right habits when no one is watching, and when everyone is, you'll be ready.
Play like you train.