Here is a list of 10-time wasters:

1. Caring what other people think
2. Trying to be perfect
3. Complaining
4. overthinking
5. worrying
6. The fear of failure
7. Repeating the same mistakes
8. Waiting to be inspired
9. Procrastination
10. Watching TV and social media

Also, check out this link: How to think less – User submitted posts – Abundance7.com.