The best way to reduce your home mortgage quickly is to participate in a 26 Payment Plan. Usually these plans are free and offered by all mortgage companies. In this plan instead of paying your mortgage once a month you will pay half the amount every 2 weeks. In addition, you will make 1 extra payment per year or a 13th payment under a traditional plan. By paying every 2 weeks interest does not build up all month since you are paying more frequently.
I know that paying 1 extra payment per year can be difficult but the upside is that it will generally take 7.5 years off a 30 year fixed mortgage. If you use a mortgage calculator you will see that it will save you 10,000s of dollars.