Being a Modern Gentleman
A gentleman is well-read. Even if his secret is that he listens to audiobooks at the gym or on his commute.
Help others out. Open the door—for a woman, for a man or a child—and give a quick smile and some eye contact. It shows that you're putting the needs of others before your own.
A gentleman is comfortable being over-dressed. No one doubts a guy in a suit or a good pair of shoes.
At the same time, don't be so squeamish about being naked. We're all just skin sacks—some are tanner, others are more toned, but we've all got something to bring to the table.
There's no shame in working hard, but it's not cool to brag about being the last guy in the office or the first one to arrive. Let others say something about it.
Always carry some cash. Even if it's just an “emergency $20 bill” tucked inside your wallet.
A gentleman doesn't dwell. You gotta let some indiscretions pass. We've all gotten away with things. Decide what's really worth getting upset about. If this isn't one of them, consider yourself lucky and don't give it another thought.
A gentleman wears a watch. It doesn't have to be fancy, but it should be good looking. When someone asks you for the time, it's inelegant to pull out your phone.
Own up to your mistakes. Apologize to those who've harmed, learn from where you went wrong or how you might've fucked up, and move on.
Don't be fussy about food. You don't have to like every bite, but damnit, give it a try. Some of the best surprises a human can have is tasting something new and unique and getting your mind blown. If you don't like it, now you know.
A gentleman can order a drink. Even if you don't care to imbibe in alcohol, know what you want to order without sounding clueless or intimidated. Have it ready and say it clearly to whomever's taking your order.
Don't let others know when your confidence takes a hit. It's always a temporary set-back. A gentleman acts as though everything is fine, because eventually it will be.