Know what you have: Check out all your fashion jewelry and accessories including rings, bracelets, necklaces, earrings and whatever else you may have.
Categorize every accessory: Put all necklaces together, all rings together and so on. If you have matching sets put them together as well.
Pick an outfit: Put on outfit you need accessories for. What color is the outfit? Focus on the shirt or the pants.
Now choose coordinating colored accessories: At first, choose one of each accessory to go with your outfit. Now one by one eliminate an accessory until you have achieved the simple but fashionable accessories that compliment your outfit.
Keep an eye in the different styles to get new creative ideas. Be creative and imaginative.