When we simplify things in the bookmarking and trip planning flows in my design, many times I find myself adding new features, new buttons, more boxes. However, next time, I would like to ask myself:
What can you subtract? From the user flow, from the interface, from the content.
If it does the same, or better yet, increases efficiency and ease of use for the end-users, then have a bias for action to start with subtracting then adding.