Combining stray editions found when searching for books or after adding a missing edition = report/flag the book from the book page. It helps librarians if list each edition's booklikes URL (including the book page reporting) in the comment.
Read reviews on booklikes of books I am reading or shelving positively. Check the reviewer profiles for recent activity to find people to follow. Booklikes is lonely when someone has few followers/followed and at least you have a book (possibly an entire genre) in common.