Life hacks I know at 30 I wish I knew at 20:
1. The best productivity app on your phone is called airplane mode (use it).
2. Make 'No' your default. Whether it's new work projects or social gatherings, saying 'Yes' to non-priorities ruins your priorities. In the words of Mark Manson, if it's not a 'fuck yes,' it's a no.
3. Normalize "I don't know anything about that" as a successful answer.
4. You don't have to finish the book or movie if it sucks.
5. Stop regretting past decisions. You made the best choice at the time with the knowledge you had. Be at peace with it.
6. Success comes down to a simple choice: 1. Decide exactly what you want. 2. Determine the price you have to pay. 3. Choose if you're willing to pay it.
7. Write down your 3:3:3 plan: 3 hours on your most important project, 3 shorter tasks, 3 maintenance activities. Defining a "productive day" is crucial. Or else you'll never be at peace (even with excellent output).