If you're feeling down today, even though you don't feel like it, put on some upbeat praise music and remind yourself of the good things God has done for you in the past -- and praise Him. King David would do this when He was feeling down and it always served to lift his spirits and strengthen him:
"Why are you downcast , O my soul? Why so disturbed within me? Put your hope in God, for I will yet praise Him, my Savior and my God!" (Psalm 42:11)