Thankfulness ensures you remain in His will.

1 Thess 5:16-18 Rejoice always, pray without ceasing, in everything give thanks; for this is the will of God in Christ Jesus for you. NKJV

Give thanks to the Lord for HE IS GOOD

(add your sentence of thanks)

for His Mercy Endures Forever.

Practice doing this over and over again and write a new psalm as you go. Scribe down your psalm of thanks. He has done so much for you, you should be at this for a long time.

At the end of the exercise I believe any downheartedness will disappear.