It would be nice to have some kind of plugins repository somewhere and a manager in the program itself to quickly list/retrieve-details/install/uninstall plugins.
Menu.Preferences..Browse packages.....Browse plugins... (here?)
Guillermooo made a pretty cool package manager plugin: https://forum.sublimetext.com/t/a-very-basic-package-manager/2131/1You still have to manually install the plugin, though.
A few days ago I launched Package Control, which provides a bunch of packages and a pretty simple interface for building them. You can check it out at wbond.net/sublime_packages/package_control.
That is a good idea about adding a menu entry under Preferences for discoverability. I’ll add that in the next version.