Well it sounds like you know where you are weakest.
My bridge experience includes one graduate level course using Tonias' book. I would suggest getting a hold of all the bridge references you can find. I have yet to find a good one, but I did go through a hand full of bridge books. Also, get familiar with the AASHTO code sections, so you know where to look for obscure information. Finally, I left all bridge problems until the end of each session and came back to them after I worked through the more familiar problems.
I would suggest doing more problems in a test like setting. I found it very hard to focus when the problems are not in a consistent order. If I were to do it over, I would do more problems that were mixed up so I have to switch reference material.
By the way, I work for a consulting structural firm, where we do mostly commerical projects plus some industrial.