If you had to offer one advise for me.

I'm completing my studies. Working towards becoming an software engineer. I suffer from 'overestimating what I can achieve in a couple of years and underestimating what I can do in decades'. I'm not sure if this is common but I pick up something, geek out about it for a few months. Come up with crazy plans. When the tough work comes my way, I slow down to a standstill. For example, right now I'm learning mobile and web development and I'll have these crazy ideas about building my own service in a couple of years. Yes, it's possible and people have done that but I don't think that has ever worked for me. So if you are familiar with my toxic trait, I'd appreciate a few words of wisdom :)