each mission you perform will expend a certain number of "Energy" points. As you deplete your "Energy" points, you will see them slowly re-generating (typically 1 point as renewed every 5 minutes). While waiting for your "Energy" points to renew, click on "Fight" and look for people who you think may be serious players - because at this level they're priority should be growing their clan. Click on those people, then when their profile appears, click on their avatar name to open their REAL profile. Then send them a "Friend" request with a message like: "Vampire Wars - Did you know that you can belong to multiple clans? If you like, I'll join your clan. That should make the game more fun. If interested, send me an invite."
Always begin your "Friend" request message with "Vampire Wars -" so they know why you're asking them to add you as a friend. This is a great way to meet and interact with people from all over the world.