Reliability is a rare currency. I try to employ goal setting and calculated risks the most, mainly because without a clear target, it's too easy to drift into that mediocrity you mentioned. Tomorrow isn't promised, so sitting around complaining is just a waste of a finite resource
I don't like people who incessantly complain and whine. We all do it from time to time but there's those who continually complain and don't take any action to rectify the situations they complain about.