When we do what we love, we feel joy, and joy generates optimism.
Whether you play a musical instrument, love working on cars, or enjoy pursuing any other activity, be sure to set aside time in your week for your hobby. If you can, enjoy some "me" time each day.
Practicing your craft, hobby, or passion will help prevent you from hanging your hopes on another person, place, or thing. All the joy you need is within you and you'll rediscover this moment by moment as you do what you love.
Following your bliss also helps keep you in the present. The past has already passed. And the future hasn't come yet. All you have this moment. Don't you want to make the most of it? When you do, your future almost invariably turns out to be more to your liking also!