“This is the day the Lord has made, we will rejoice and be glad in it.” Psalm 118:24
All you really have is today. This, today, is the day the Lord has made for you. What can you do about yesterday? It has come and gone. What can you do about tomorrow? No one but the Lord knows what tomorrow will bring. What can you do about today? Put one foot in front of the other and ask the Lord to lead you where you can do the most good for Him.
Whatever you have done in the past whether good or bad you can not change, it is done. If it was something bad don’t repeat it. If it was something good do repeat it. Live in the now, don’t put it off, do what you feel the Lord wants you to do now. Then rejoice and be glad in it!