Quality over quantity!
Go for good fit, good quality pieces in classic cuts that suit your body shape etc. then buy the best you can afford. Look after them, dry clean, press, proper hanger spaced out in your wardrobe
Learn which colours suit you and stick to it. DON¨T BE A SLAVE TO FASION.
Invest in the core pieces you will use the most often.
Keep wardrobe to casual size and make sure everything works together - makes getting dresses a piece of cake.
Update with cheap accessories eg. a scarf in this season must have colours etc BUT only if they suit you.
A good hair cut and colour can take years off and look effortlessly style able.
Shoes, Bags and coats - big investment pieces but really make a difference to the overall look.
Jewellery can make or break an outfit,
Good skin, and good make up - keep it simple and natural not over applied, just fresh I´ve just got out of the spa sort of look. (chance would be a fine thing)
Most of all - good under pinning's, great bra etc will make you look oh so much better than a badly fitted ones
Hold you head high and remember you look fab, confidence makes a difference honestly.