Whatever thought you repeat in your mind sinks into your subconscious and take roots.That is how good or bad habits are formed. Thoughts of anxieties and worries will create more of the same. You will remain unhappy. Why not repeat a sacred holy mantra that has all powers to free you from the prison of your own mind? Japa is the Way! Way to have darshan of your true Guru and your chosen deity, the Ishta.
Love and gratitude!