I try to be the guy giving the compliments. Like, "Hey I like the jacket," or, "Hey I like the hat," stuff like that. I'll say it strangers and they always seem surprised and put on a seemingly genuine smile.
Us guys need to look out for each other, ya know? Some guys will never hear a compliment, and just hearing one can make someone's day.
Hey, nice attitude! I can relate to that, and it's why I made this comic doodle. There's nothing like creating a good ripple in someone's life (and I don't think it's insincere to share what naturally crossed my mind anyway).