Below are 16 common mistakes that could ruin your life so do your best to avoid them.
Top 20 mistakes that could ruin your life
1) Being born after you graduate: Starting to think about your future when you are already 23,24 or even 30 years old. The Earlier you start the better your chance will be (see also Is it too late to succeed?)
2) Not Studying your manual: Studying the instruction manual of all gadgets while ignoring your own manual (not studying psychology)