Excellent post by Phil Johnson on biblical manliness. Read it all, but this should whet your appetite.
If you want a taste of what real manhood looks like, do some gospel ministry in a hostile environment. Stand up for the truth in some venue where it is under attack. Get a solid, manly grasp on the Bible and stand up and teach its hard truths in a way that helps make the truth clear to people who are struggling to get it. Contend earnestly for the faith when some nice-sounding heretic wants you to sit down and have a friendly dialogue about it. Be the kind of man Paul describes here: someone who is steadfast and sure, with a solid grasp of classic biblical truths that have gone out of vogue. Stand against popular opinion when you know you should, and do it every time the opportunity arises.