To help clarify your wine, you can use plain gelatin. Gelatin bonds with molecules in your wine and precipitates with them to the bottom of your bottle. This makes it easier to remove very small particles in your wine when it's time to rack it.
You don't need to get anything special — plain gelatin from the grocery store will work well.
1. If you're making a gallon of wine, prepare 1/2 teaspoon of gelatin.
2. Let the 1/2 teaspoon of gelatin "bloom" by putting it in 3 oz of cold water for 1 hour.
3. Microwave for 20 seconds.
4. Stir until dissolved, then add to your wine.
5. Swirl your wine well, and then place it in your fridge to cold-crash for 2 days.
6. Rack your wine again.