Thanks so much for all your wonderful comments on The 20/80 Syndrome Post. I'm so pleased I posted this, as I have received so many replies with lots of opinions on how to go forward.
My favourite advice overall is:
To wear what I've got-regardless of occasion.
Stop buying for the forseeable future-I don't need to buy clothes for the sake of it anymore!
Carry on collecting vintage. If I do this in the future, it will only be unique pieces that I buy and only from charity shops or boot sales.
Its school holidays next week, so I may well use this time to evaluate every item in my wardrobe for a selling opportunity on Ebay. Otherwise, if I'm too attached, I'll just hold on to what I've got with a view to appreciating what I have, not coveting what I haven't got and wearing the pieces more regularly.
Thanks so much everyone!!