I cleared out my wardrobe when I was really angry - which made me ruthless.
1. Anything that was too short
2. Anything that really didn't suit me - colours and styles.
3. Anything that was too damaged, worn, stained etc to repair.
4. Anything that was too small
5. Shoes that I won't wear (too high, tight, not my style).
6. Old underwear, tights and socks.
7. Anything in a fabric I don't like.
Of this "Get Rid" pile, I sold some on Ebay, gave the good-but-not-brilliant stuff to a charity shop and threw away the rest.
Of the remainder, I immediately repaired, ironed, polished everything, and packed away my winter clothes. My resulting summer wardrobe was concise, but it all fitted, worked and suited me. I've borne this is mind as I have bought new clothes since, and though I wouldn't say I have a capsule wardrobe, I have a much smaller, harder working one.