Have someone kick you in the dick when you do stupid shit. You'll either get tough or stop being dumb.
Or, sell it all and get a bus pass and save the rest of us from yourself. I'm almost 40. I speed, pass on the double yellow, occasionally do really dumb shit. I try and minimize my exposure to the negative consequences of my dumbassery.
I can be dumb on the kids pw50....especially with a couple beers. Blah. Fucking kids.