600) Sometimes, when I get discouraged, I take the time and review my history, specifically concerning what the Lord has done for me.
In Nehemiah 9 we see this example. He records, in part: creation (vs. 6): blessing of His people (vs. 7-8); freeing the Israelites from the slavery of Egypt (vs. 9-12); giving rules to live by (vs. 13-14); providing food and water when needed (vs. 15); and stayed with His people in their disobedience in the desert (vs.19-21).
If we take the time to review what God has done for us through the years, it will be a source of comfort and strength when we need it most.