You guys should really stop complaining about the energy, seriously. I mean just keep on doing quests till you rank up and you'll recieve a mail from the spiral HQ which includes energy. By the way, when you do run out of energy then just wait and do something else you don't need to wait and keep on doing nothing till you have 10 energy again, don'y be so lifeless.
Ps: I wanna see you people make a game like this
 "Spiral Knights"){kind=icon}