I have all kinds of book marks at my place. I've gotten to where I'll have at least a couple of books on my night stand next to my bed because I've gotten to where I'll read more than one book. So I have to have at least a few bookmarks, at least.
I don’t use conventional bookmarks but rather a sheet of paper. When I read, I tend to make notes. Either on the book I’m reading or things I’m thinking about. Plus, I write down the page number. If it’s health book where I would skip chapters, it’s easier for me to keep track by writing down the pages I HAVE read.