Less is definitely more – I find if I have too much stuff in there, some of my favourite bits get hidden, forgotten and unworn – not the point.
Work out a system that’s good for you. Perhaps have all skirts together, all trousers together and so on.
For dresses, either colour-code or divide into casual/work/evening.
Treat yourself to some nice hangers (IKEA do wooden ones really cheaply) and hang items individually, with buttons and zips fastened (that way items will retain their shape better).
Keep moths away with Zensect Hanging Moth Proofer, but make sure everything you hang is clean as well.