Editor’s note: If you or someone you know is struggling with mental health, help is available. Dial or text 988 or visit 988lifeline.org for free and confidential support. CNN  —  Maybe the most useful advice I ever received came from my dad when I went away to college . “When you are feeling lonely, sad, overwhelmed or unmotivated, just put on your sneakers. You don’t have to put pressure on what you do next,” he told me. “But once your shoes are on, you might find yourself at the gym, on a