The first step in solving a problem is admitting you have one.

Motivators:
1)as stated previously, events to train for

2)a riding partner.

3) a swift kick in the

If there is a bike club in your area they should have weekly rides.
a lot of bike shops also have weekly rides

What's stopping you?
I imagine you sitting there saying to yourself "I really should ride my bike today but_____________"

What goes in that blank?
Whatever it is, you know it's lame.

RIDE YOUR BIKE