Especially right at the end or the beginning of an year. It brings foward that feeling of starting fresh, and the joy of rethinking your relationship with your clothes.
The classic system always works best as well.
Section by section take everything out, divide by what will be kept, donated, or recycled - there should be a few collecting points where you live. I also started two other piles, the ones that just need repair and a few I'll try trading or giving to a friend.
This time I helped my mom with hers and did a full closet shopping with her clothes. š