Boards
Things you are fine with now, but weren't when you were younger, and which therefore seem silly now
For example, when you get on a bus and sit down next to a hot member of the opposite sex and you suddenly have the various thoughts going through your head:
'Oh my God shes hot I hope she's in love with me and listens to Scheer as much as I do... I reckon if I asked her out we'd live in a cottage in Saffron Walden and be together forever and I'm going to open my bag and show her all the AMAZING new CD's I just got from that charity shop! I'll ask her out if she doesn't get off next stop... skillz, she didn't but maybe I'll wait until the next one... cool, still want her to notice that copy of the Blameless album before I wade in and - oh, she's got off...'
Nowadays I'd either stand instead so that I could just get a better view or else merely be thinking: 'I hope she gets off soon so that I can inherit her newspaper and legroom'.
What have you got better at / changed your outlook on with the benefit of age?