My general view on fashion is that it should be versatile, it should be classic, it should suit you. One of my all time favourite fashion pieces is the classic LBD, I think I own at least 10, all in varying styles. However recently, I've started straying more into the accessory zone than my usual minimal look.
So, take one H&M LBD (my t-shirt dress is fabulous, flattering and was a steal at £8), add one colourful scarf (mine was a present from a friend from Turkey, but Topshop always have a great selection), throw in an oversized bag (mine's Topshop) because it styles an evening look away from the standard cocktail clutch bag, finish with a statement watch and some heels et voila!
Easy peasy.