Here is another great tip:

1. Mix one teaspoon of a mild pH balanced detergent (a mild non-alkaline, non-bleaching detergent) with a cup of lukewarm water 
2. Blot
3. Mix one tablespoon of household ammonia with a half cup of water
4. Blot
5. Mix one teaspoon of a mild pH balanced detergent (a mild non-alkaline, non-bleaching detergent) with a cup of lukewarm water
6. Sponge with clean water
7. Blot

Note: Always test an inconspicuous area for colourfastness, etc. before treating the exposed area. Also note that certain stains are permanent