LIFE is an opportunity
As what they've said, 'change' is the most constant thing in this world. Now, why? It's because every day is an opportunity to be thankful for. We don't have to be afraid to commit mistakes, because we are given another day to correct it. Well, maybe, those mistakes are limited only to those subject for corrective actions. For example, yesterday, you told your friend about the flaws of someone, in which it is normally judgemental and is somewhat wrong. Thus, when you wake up today, you must commit yourself to make a move. Say sorry to the person you've misjudged and to the person you told it to.
Never give up on things that's worthy of your try. Exert some effort and be happy.