I have used the Bates method to avoid bifocals. My contacts are are optimized for indoor distances and I have a pair of simple glasses I put on for distance/driving.
This book is a very good resource. It describes how lenses were originally intended to be an eye exercise tool, to "cure" the problem by tugging on the eye muscles and not how we use them today as a permanent helper.
This phenomenon is explained in this book. In short, your eyes have the ability to see crystal clear all the time if you train them in a particular way.