I am fond of making a goals list which I absolutely love to check/ cross once these gets completed, one goal/ task at a time.

However looking back into old goals list made me realise that the goals that were specific were completed even if it took slightly longer time to achieve. The generalised goals for example - Master Python, Master SQL didn't get achieved because there isn't anything specific about it. 

That's why the goals must be measurable so that you can see your progress overtime or else you would just keep on delaying achieving these goals no matter how important these are for you.