Habits
Say what you used
In one line: When you use an important ability, tell the team in two words.
Why
If your teammates do not know your smoke is gone or your flash is already used, they wait for help that is not coming, or they waste their own on the same spot.
How to train it
Get used to very short, fixed phrases: "smoke down", "no flash", "ult ready". Say them right away, as you use the ability.