If you want to feel safe, healthy, and hopeful, try to act as if you did feel that way. "Fake it 'till you feel it." maybe start with health -- try to walk energetically, speak energetically, do physical things.
Gretchen RubinTurns out that people who try new things, go new places, learn new skills, etc. are happier. This can be tough, because novelty and challenge also bring frustration and irritation - but if you can push through that, novelty and challenge can bring enormous happiness rewards.
Gretchen Rubin