A couple of days ago I was walking my bike out of my garage and my neighbour noticed me and commented "I suppose getting on the bike is the hardest part of a bike ride, eh". My reply was "no, getting up the hill at the end is the hardest part"(I live on top of a small hill).
I suppose my neighbour was, like you, getting at the motivation issue. I remember once reading in a running mag that the hardest part of any training run was the first step. To an extent this is true, however, over the years I have found that developing a routine solves this issue and the pleasure of the rest of the exercise session become the only part that sits at the forefront of ones mind. In other words if you force yourself to develop a routine you will develop a way of life that eventually ceases to be a chore.
Concentrate on what you like about cycling to help overcome any lack of motivation at the moment.