LOL judging by your list you haven't learned your lesson very well.

Success is mostly based on habits. So if you want to add something that will take a while, try it like this: I will only do one lesson of duolingo a day, at a certain time. If I have done that - success!
If it is fun and I want to do one more - I will just do it.

That way you might not look back and see all the stuff you didn't achieve, but all the stuff where you did reach your goal and even more!!!