A struggle for most of us. I attempted many times, but never seemed to stick with the endeavor. However, I have finally accomplished the task…but not by reading. I bought an audio Bible, on cd. I spend so much time in the car already that I thought it would make good use of the time.
I have not found a Catholic version in audio format though (in fact a Catholic Answers apologist indicated they are not aware of such a thing either). So I listened to the King James Version, and read the missing books in my Bible. The one I got was The Listeners Bible, narrated by Max McClain. His voice is easy to listen to.
However, I must caution that you need to bear in mind the translation is not always accurate. You need to compare anything that raises a question, to the Catholic Bible, and/or ask a trusted authority (the Apologist Forum on this site?).
This method helped me complete what I had not before. And at least I feel I have a better, more comprehensive, understanding of our salvation history.