It could just be any advice that you would like to share.
For example, a simple advice, lifehack, lesson learnt, trait, information, wise quote, interview or CV tip, skill to aquire, secret tip of success, fact of life, self development tip, grooming or dressing tip, trick to master, etiquettes or whatever.
It will be very helpful for all of us, as we have lots of highly respected members that can give great advice.