I would love to read what are the best tricks you learned in your commuting experience.
I would like to propose a format, where we use one comment for each single trick/suggestion, so if you have multiple tricks, post multiple comments. This would allow upvotes to create a ranking of best suggestions
I will start with a couple of tricks from my experience.
Always carry a spare tube, tire levers, and optionally an allen key if you have thru axles. Also, a mini hand pump ideally but a CO2 inflator works too. Learn how to change your tubes - ask a friend or your local bike shop to show you how.
This will change your inevitable flat tire to a minor inconvenience and a couple minutes instead of a headache and potentially being stranded.
A tiny patch kit can add insurance against more than one flat.