Look on pinterest for ideas and create a capsule wardrobe. I have a work and a weekend capsule wardrobe plus a few formal things.
Start with a nice bag, 2/3 pairs of shoes, jeans/chinos, skirt, dress, vest/cami sleeveless top, short sleeve top, long sleeve top, coat/jacket. Obliviously you can have more than one item of each, depending on how often the washing machine is on
.
You can also include statement jewellery if you like, I'm not a jewellery person so keep it minimal. And don't forget good underwear!
I also read that you should throw away any clothes that make you unhappy. I done this over the Easter break, it was liberating. I threw out jeans that gave me a saggy bum, a coat that didn't really go with anything and anything else I was hanging onto because I might wear again but wouldn't.
Another thing I also read was that you should only buy three key things per season to add to your capsule wardrobe. I have started this and I'm now buying better stuff that lasts longer.
Good luck