Do you work with a colleague who is perceived as a bit of a flake?  Here are two articles on what to do about the appearance of this trait in yourself or a co-worker:

Forbes, Sept. 10, 2015–The Dependability Test: Are you The Office Flake? by Rob Asghar

Forbes, Sept 11, 2015–How to Cultivate “Stick-With-It-Ness” in Yourself and Others by Rob Asghar