Always keep a trash bag or bin in your closet. If you have not worn an article of clothing/shoes for that season, put in the bag. You will most likely not wear it the next season. You can decide later if you want to donate or tray and sell it at a consignment shop.
If you would like the illusion of elongating your body, wear stripes that run vertical, not horizontal. It draws the eye up and down, rather than across the body.