Shiv Shakti Puja should be performed for a Long and Happy married life. Uma (Goddess Parvati, the wife of Lord Shiva) and Lord Shiva Puja is performed for a Happy Marital Life as they are considered to be a perfect match i.e. Shiva and Shakti. This Puja is considered to be best for marital happiness. If there is any discord in the relationship, all are resolved. One should conduct this Puja at least once in a year for a happy married life.
It renders all the anishtas the unnecessary things useless and effectless.