Do you prefer to keep your outfits together in your closet using double hangers? Instead of spending money on those double hangers, use a soft drink or beer can tab to connect standard hangers.
This tip comes from household blog Idea in a Bottle, where the author uses this idea to keep her daughter's outfits together. I imagine this would also work well if you wear a uniform and want to keep your specific matched sets together.
Pop bottle top -- Hangers? [Idea in a Bottle]