Step 2: Cleaning
Take some time to clean out your closet. I found this infographic that will definitely help you in the process...
If you're still not sure whether to keep it or toss an item, here's some help.
When donating you could think about bringing your unwanted duds to H&M... you will receive a 15% discount on one item for every bag of clothing you recycle. (Valid for the Netherlands, please check your region)
Instead of donating you could also participate in (or organise!) a clothes swap party.