The Rosary is one way Mary has often recommended we pray. The Rosary is a series of meditations on the life and ministry, death and resurrection, of Jesus Christ. Through this powerful prayer, we become "One mind" with Christ and, alongside Mary, we experience His gift of mercy in meaningful ways that cause lasting changes in our lives.
If you would like to begin learning how to pray this powerful meditation given to us by Mary herself, I've written about it in my blog here and you can get more information from the Rosary Army.