Do the following and you will be liked:
1. Be positive.
2. Control your insecurities.
3. Provide value.
4. Eliminate all judgments.
5. Become a person of conviction.
Look to the Prometheus Institute for details.
Sounds a bit like the Four Agreements, don't you think?
1. be impeccable with your word
2. don't take anything personally
3. don't make assumptions
4. always do your best
Which do you find most difficult?