Motivation is what keeps us going. Without it, we feel weighed down, we lack energy and we lack the drive to do things. How do you go about getting your motivation back?
What you need is the basic motivation to kick-start you into action and make what you do seem exciting and interesting.
Everyone has their own sources of motivation and their own little ways of getting that 'bring on the world' feeling! No two people are the same and different things make different people happy. You need to find out what gives you the energy you need and spurs you into action, and use it.