Wake up on Beltane and be a catalyst and a beacon of joy to other people and yourself. Se this as your intention when you first wake up and remind yourself throughout the day. When you see yourself in the mirror, tell your reflection how awesome they are. Give other people compliments whenever you interact. Use this day as an opportunity to perform random acts of kindness throughout your town. For example, leave pennies on the ground head side up, write little notes on stickies and put them on products in the grocery store or in library books, or bring in your neighbors trash can. Tell jokes, laugh loudly, dance wildly, and sing along to your favorite song.
If you feel resistant to do this, that is all the more reason to try it as an experiment. See how it changes your mood.