Never regret. Because I believe that is wasting time. If You got time to regret, What about just do something to make it right?

I will <em>never</em> do the cinnamon challenge ever again! It was horrible. 

I can't really think of anything Mohammad.How about you?

I'll never give some one the trust that I don't know him well

 I will never travel with someone that I don't know very will.