My answer to Why is it bad to show off?
Answer by Ken Larson:
It is not bad if you can back up your claims and if you convey your prowess with class. An example from the business world:
“Know where your market is headed and get their first – then write and speak about your success indirectly by helping others. Demonstrate humility and a satisfaction in helping others succeed. They will find ways to give you credit. There are ways of tooting your horn without making peoples' lights go out.”