"I really think it isn't. it's about taking chances and wearing stuff that makes you happy. I realise lots of people might not feel happy out of a comfort zone of jeans, or get self-conscious about showing bits you'd rather not, but to me it's partly about pushing comfort zones and finding that maybe it's easier than you thought.
Last week I mentioned feeling self-conscious about the whole 40s thing, yet today I went to sainsbos in full forties (minus the hair), something I would never have done if I hadn't been doing the frock thing (if I take the pic I feel I have to wear the frock all day). I would have found it so much harder to get over the hurdle of wearing things that I feel might draw attention outside the house otherwise, maybe I would never have done it.
It's about spending a little time thinking about what makes you feel - for want of a better word - a little more "special" than usual, and ignoring the fact that you haven't got an occasion to go to, just for the sake of it."