Go for a walk and clean up parts of the community as you do so.
Many youth do not get to experience daily Mass. Oftentimes they are surprised by how short and "easy" it is to go to daily Mass. Go together as a group and grab a snack together [...]
Get together with a couple other groups and do a free car wash in the Church parking lot. That's right, don't charge a dime. Instead make flyers or cards that thank them for stopping by [...]