I simply put a space code to the left of the first character in the title. Greater emphasis uses two space codes. Spaces sort at the top of the list. Sure - just click the center divider in the hotlist until the 3 bars icon appears, then arrange your bookmarks by dragging and dropping. Or look on the about screen under the Help menu on the main menu bar.
Most users do.
Another more flexible way, is to create your local home page full of your most often used links. If you don't know html, it is real simple. For easy editing, just put one link per line. Then set that file as your start page. Now all your sites are just a Control-Space away.