I really like Phase Eight - feel like they design for women in their 30s and they also have a good range of stuff which is smart while being less structured than other office clothing. I have a cardigan from there which I adore - it's like a cross between a jacket and a cardigan which is just so useful in a work context.

The other thing I would suggest is having a friend come round and look through your wardrobe with you and that might give you a fresh perspective on your clothing. You could also try some kind of challenge – like you have to wear your clothing in some way differently to how you usually do (different accessories, matched with different tops/bottoms/shoes) every day for a month.