Get the bike fit properly to you. Doing so will increase your stability, and also will massively improve the energy in to energy out ratio (i.e. make you not have to work as hard to go the same distance).
Make bicycling fun.
Reward yourself for goal achievement... if getting on your bike and going jus a mile three days a week is a goal then achieve that goal and get something small for yourself (cup of good coffee, chocolate bar, something for your bike or cycling apparel like gloves or socks).
Relax, and have fun