sync all the %appdata%/sublime text/packages folder. All settings and plugins will be on all your computers but, tabs and sessions will be independent for each computer... This is the "best" way in my opinion since the path for working files are most of the time going to be different across different computers. This way you can have for example your work computer with work files and your laptop with some other project but sharing same settings/plugins
you can use this .bat file to sync packages folder.
ren "%appdata%\Sublime Text\Packages" "Packages.ORIG"
mklink /D "%appdata%\Sublime Text\Packages" "C:\.DropBox\My Dropbox\SublimeTextPackages"
change the dropbox path to match yours of course.