If you want to think it just do it and don't think it too much and regret why you haven't done a thing great.

Actually you can manage the time well, learning to control some unnecessary times to do some unnecessary things. And then you will find you have enough time to do it well.

Don't find any excuse to think and regret.  You see when you take action you still can deal with it well.

Nothing is thinking perfect and take action. Just do it and adjust it then gradually become more and more great.

You can change it as long as you are willing to change it.