Discouragement is a spiritual attack and must be fought in the spirit.
2 Corinthians 10:4-5
Ephesians 6:11,16-17
James 4:7

Getting our minds on Jesus and eternity puts things in proper perspective.
Romans 8:18
2 Corinthians 4:16-18
Hebrews 12:2-3

Fill your heart and mind with God's Word.
Psalm 94:19
Psalm 119:28
Psalm 119:59
John 8:31-32
John 15:3

Count your blessings and think positive thoughts.
Psalm 42:5
Psalm 103:2
Isaiah 26:3
Ephesians 5:18b-19
Philippians 4:8

Speak faith and praise the Lord for deliverance.
Psalm 9:1
Psalm 35:28
Psalm 66:8,16
Psalm 107:2

Forget yourself and your own problems by getting busy helping others.
Isaiah 41:6
Proverbs 11:25
Luke 6:38

Scriptures to claim when hit with discouragement:
Deuteronomy 31:6
Psalm 31:24
Psalm 142:3a,7a
John 14:1
1 Corinthians 10:13