Here is an easy way for you to keep track that will take less time and serve the same purpose:
Make a simple index card file, just like you would have done for a recipe card box. An old shoebox will do fine or you can purchase a plastic index card box for just a few dollars. You will also need a bunch of index cards and some post it notes or paper clips.
Read through your cookbook and as you find recipes that you want to try, mark the pages with either a post it note or paper clip. You can designate different colors to indicate basic food categories (main dish, bread, sides, desserts, whatever you like). If you are using post-its, you can write down the name of the recipe if you like. I think clip are easier as they don't fall off and it means less writing.
Then when you have time (or you can do this at the same time if you want), take one of your index cards and write the name of the cookbook at the top. Then write down the category you want to work on. Next, write down the name and page numbers of every recipe from that cookbook that you marked for that category. Once you have made up cards for all the recipes in that book, file the cards in your box, using the dividers to organize them.
Repeat with each cookbook.
Then you will always be able to pull out your box, flip to the Main Dishes category, for example, and see all of the recipes you wanted to try that were main dishes and know instantly which book they came from and which page they were on.
Then, once you have tried them, post the good ones you want to make again.
One of these days I will take some pictures and write up a blog post about this - it is a really easy way to keep track of things
