I'm surprised no one mentioned meditation yet!

A regular meditation practice helps with impulse control (sitting still for X minutes requires exercising self control) and that will help with resisting the urge to do tasks which are immediately gratifying, which will free up time and energy for activities which lead to long term growth.

Two things really helped me with meditation: setting a timer, and meditating every day.

Insight Timer (not affiliated) helped with both of these, keeping track of how many days in a row you've meditated, and allows you to set daily reminders.

There are also guided meditations available (in the app or YouTube if you prefer) if you are just starting out.

Best wishes!