"Yacov was alone when a man fought with him, until the dawn."
The "man" was Esav's guardian angel, who tried to overcome Yaacov. They had a great battle but the angel was unable to defeat Yaacov. Usually, when a person is confronted with an overwhelming challenge, his sense of optimism is diminished. How was Yaacov able to contend with an awesomely powerful angel, who was intent on destroying him? Yaacov Avinu mastered over his emotions through his relentless trust in HaShem. He prevailed over the angel by continuously attaching himself to HaShem and his constant heartfelt prayer.
Lesson: We can overcome any challenge, no matter how intense, by staying focused on HaShem. As long as we trust HaShem and pray to Him, He will save us from our trials, no matter how severe they may be.
Visualization: Envision the angel engaging Yaacov in battle. See Yaacov immediately overcome his fear by staying aware of HaShem and praying to HaShem for mercy, kindness, and redemption. Whenever you are confronted with a challenge, stay focused on HaShem and pray to Him. Strengthen your trust in HaShem that He will save you from all of your hardships.
(Based on the commentary of the Seforno to the Torah)