It is really easy to get caught up in being disappointed in what you didn't do.
Here is a fun fact about me. One of my favorite movies of all time is Meet the Robinson's. It is a really under appreciated Disney movie that is both hysterical and full of great lessons. One of the best lessons on the movie is Keep Moving Forward. Whether your invention didn't work out as planned, or whatever goal you didn't quite make, keep moving forward.
Sure, it's good to learn from the past, and look back and reflect on how your choices can be improved, but dwelling on the past, feeling disappointed and letting that rule you will get you nowhere. Keep your eyes on the future and remember that every day is a brand new day.
I am choosing to learn from my setbacks and keep moving forward.
And I am totally gonna watch that movie now...