Make your whole year's plans in spring, and your day's plan early in the morning.
The first light of the morning will help you take away yesterday's unhappiness. Why not have a try?
Challenge your limits every day, you will have a perfect youth, just like the flowers growing in the grass, as long as you make enough efforts, you will be noticed by all.
Do not recall the past unhappy, just need to be a perfect yourself today, so that you will not regret your youth.