I'm a firm believer that being a successful adult means mastering the art of being responsibly irresponsible. It's all about making reasonable choices to balance out the passion-driven decisions that make life worth living.
For me, 2015 quickly introduced me to my 30s. My friends and family found this to be a bigger deal than I did, but I celebrated with a Barcade outing with a random assortment of said friends and family to "celebrate." I had a blast playing X-men and TMNT and firetrucks while enjoying a few stouts/porters with some of my favorite people. My mom even baked cookies and brownies (I'm not a fan of cake - unless Napoleons count, because they're amazing - but I digress) which were mostly gifted to a fellow birthday celebrator who further extended the birthday spirit by feeding the baked goods to friends and strangers alike, communion style. It was quite an interesting night, and somehow I was home, mostly sober, and asleep just after midnight. Getting "old" ain't so bad ;)
In a nutshell, I don't take myself too seriously, have no problem laughing at myself, enjoy the little things in life, and embrace my inner child as much as possible.