Question for Practicing Lawyers

Do you think that being ready to practice law has any bearing on whether or not you pass the bar? In other words do you think that those people who have worked in law firms doing substantive work for a period of time have a better chance of passing the bar?

I have a year and a half left before I take the bar and I already purchased my Family Law Practice guide set. I also want to purchase the bankruptcy and personal injury sets. Am I jumping the gun?

I will use these resources at work not just for decoration.