You can set up your own Bookmarks and name them whatever you want e.g. "Must Try". Then when you are looking through the book have open the book recipe listing on your Bookshelf. Every time you see a recipe you are interested in, add the "Must Try" bookmark. If you are going to be adding a lot of these set up several bookmarks e.g. "Must Try Sides", "Must Try Cookies", "Must Try Pies", etc. Then when you want ideas for something, filter by that bookmark using the filters at top right.
Since you have just joined EYB, take a look at the tutorial video for new members on using Bookmarks. There is also a help section on using bookmarks.