I turn 30 in February and sometimes I still feel about 16.
There are people a lot younger than me who just come across so confident and look like they don't take any shit from anyone and here's me who doesn't have a clue and still comes across like a teenager. I suppose it doesn't help that I look younger than my age (or so people say).
So what's your secret if you (or at least look like you do) have your shit together?