Sort out your wardrobe once a year
Short answer: Take everything out, put back what you have worn in the past year and look at the rest. Most people wear twenty percent of their clothes eighty percent of the time.
Use the past year as the test
If you have not worn something in twelve months, you probably will not next year either. See bamboo clothing for women.
Look at what is missing
Sorting out reveals gaps. If you are short three pairs of socks or two basic t-shirts, buy exactly that. See bamboo socks for women.
Replace gradually rather than in batches
Two new pieces a year keeps a wardrobe even. Big purchases every five years make it uneven. See bamboo t-shirts for women.
Frequently asked questions
How often should you sort your wardrobe?
Once a year is enough. Do it at the change of season when you are moving clothes anyway.
What do I do with clothes I do not wear?
Pass them on if they are intact, and use them as cleaning cloths if they are worn out.
How do I avoid buying the same thing again?
Write a list of what you actually lack and buy only from the list.