Yes, I am Catholic and participate in giving things up to better myself for Lent. Even if I don't go to Church.
My list of things I'm doing to better myself:
1. Giving up all carbonated beverages. Pop or Soda for the rest of the world, energy drinks, carbonated water. Gone.
2. Giving up alcohol. I'm already half way there since I don't really drink anymore.
3. Exercise at least 4 times a week. Not only does this help me feel better but has made my diabetes control second to none!