Worrying about things you cannot control is a waste of time.
Feeling guilty and beating yourself down for messing up is a waste of time.
"There is therefore now no condemnation to them which are in Christ Jesus, who walk not after the flesh, but after the Spirit" (Romans 8:1).
Trying to change what only God can change is a waste of time.
Complaining is a waste of time.
Being fearful is a waste of time.
"For God hath not given us the spirit of fear; but of power, and of love, and of a sound mind" (2 Timothy 1:7).
Playing the blame game is a waste of time.
Comparing yourself to others and wishing you could have whatever they have is a waste of time. You probably could not handle having some of the things other people have anyway.
Don't waste time. Use it wisely.
I just want to encourage and inspire as many people as I can for Jesus Christ.