I love Blessed Mother Teresa's "Flying Novena. In an emergency, just pray the Memorare prayer nine times for whatever is causing you stress or worry, knowing that your heavenly mother will intercede in prayer for you.
Jewish man who hated the Catholic faith, accepted the challenge to wear the Catholic miraculous medal and say the Memorare for 9days. He did not even know any Jewish prayers, and he wrote the Memorare down. When he went into the Church to pray, the Virgin Mother spoke to him and he wanted to be baptized Catholic immediately. The miracle of doing one act of honoring the Blessed Mother was fulfilled.