Never compare yourself to anyone else. This will make you frustrated or arrogant.
There is no point in worrying about the past.
There is nothing to worry about again. There is nothing to be disappointed about what will happen. Our job is in the hands of the creator to try and get results.
Never feel weak. Leave the company of those who present you in a weak way, no matter who he is ...
Don't trust anyone too much, it is likely to be deceived.
Don't tell your weaknesses to anyone except your parents. If the relationship is bad, that weakness will stand as a tool against you.
Practice reading books. It will enrich you spiritually.
Talk less, listen more.
Criticize yourself and it will expose your mistakes.
Mix with good people.
Develop yourself as a confident and positive thinking person.