Hi Hilary! Be enthusiastic and set goals!
Enthusiasm and motivation go hand-in-hand. The more you care about something, the greater your enthusiasm, interest and motivation. Show it! Enthusiasm is contagious, not only will it motivate you but you may also have others jumping on your wagon.
Goals are great motivators to keep you moving forward. Set a goals for yourself and then go out and achieve them.
Motivation has to come from within. Others can inspire, but without your buy in and (self) motivation you'll be dead in the water.
I hope that helped. If that created more questions..ask. If you need elaboration..ask. Knowledge is power and a motivator in itself.