These are not suggestions to anyone, just some things I learned through experimentation and keep telling myself

Similar to what Nabeel S. Qureshi has made (please note that these are a result of my own biases and context and are subject to change):

1. Never compare with others. Everyone has their own trajectories and objectives in life . Tampering your own simply because you want to be as good in something that does not even matter, you will diminish your success. (For those familiar with AI - think about training a vision model with a cross-entropy loss using gradient descent on another model!). Choose your metrics
2. People can be insanely resourceful. Doing things alone is not a thing - good connections can help you bypass a lot of steps in the journey.
3. Only think about the value you gain from others - No one is perfect and only some characteristics of a person might correlate with yours. Conflicting with others (externally or internally) is a waste of time. Maintain good relations with everyone so that you can leverage the potential value from them.
4. Never let others control your thoughts. This does not mean avoiding to learn from others. Feeling annoyed in someone's presence or from their thoughts means giving them the console to your peace.
5. (Modified from J.K. Rowling's Harvard commencement speech) There is an expiry date to blaming others for your circumstances.
6. The only thing you should worry about after committing a mistake is not learning from it.
7. Be driven internally. Plans might change over time but drive should still be fundamental and internal
8. Doing the right thing is very important -- but this is impossible to get unless you do something. Once you get to something, do it with full force and then don't be afraid to switch as soon as you realize it's wrong.
9. Keep things simple. Over complication is productivity killer. Compress the most important information
10. Do not fall into hard-work or productivity traps. These are ways to keep yourself happy that you are doing something. The focus should be on how close I am to the goal.
11. Do not try to climb status ladders. Sounding smart / correct are lucrative for the brain since this puts you in secure positions by satisfying your ego.
12. Inaction is equivalent to bad action - a lot of things don't happen simply because we choose to not act.
13. Experiment, come up with your understanding and contradict your interpretation as badly as possible - this is a good way to know where what you think does not apply. Logical conclusions from narratives miss several bits of information, we can trick ourselves into drawing obsolete causal relations between facts!
14. Most advice is what worked for the person giving it, highly dependent on context and his/her biases. Moreover, we tend to extract what we want to be true rather than what is true; believing in yourself and doing educated experiments in life is as good of a heuristic, as is taking advice from random people with entirely different aims.
15. Don't believe in statements - find out the numbers, verify facts, think for yourself. Humans are biased beings! No one is conscious 24x7.
16. Strip the inessential and play in hard mode. Checkpoints are intermediate steps, not the final goal -- optimize for a checkpoint and then quickly switch to the next objective. There is no time to celebrate! Life is short.
17. Remind yourself of your principles - the brain has very small active working memory - stuff gets overridden!