My Missing Trumpet

How do I do that? Show my strengths and achievements. It goes against my grain and all my upbringing to be humble and keep modest about my accomplishments if I have to impress the people around me. I've always rationalised that if others cannot see the good I've done, I'm no worse as a person. Now I'm told otherwise, that I should capitalise every "showtime" and make myself visible in order to get noticed, to get ahead. When have the rules changed? Am I wrong to play my own game and am I the one to blame when opportunities bypass me? I never learnt to blow my own trumpet!