I can sometimes feel spiritually overwhelmed. There are many reasons for it and it presents itself in different ways but the effect on me is generally the same: God seems so far away.
It is at these times that I remember the prayer of Blessed Teresa of Calcutta. In the documentary of her life, she teaches a young woman how to pray. She holds up three fingers and on the first she says "Jesus in my heart," on the second she says "I believe in your tender love for me" and on the third she tells Jesus, "I love you." Lather, rinse, repeat as necessary.
It is the simplest thing in the world, but it does a world of good.