Aliases to scripts also work within folders. If you prefer, you can stockpile your scripts elsewhere, and refer to them as aliases within folders inside the Scripts Menu. Just be sure to save the compiled script by the name that appears in the Menu. Change it later if you like. This tip works whether you have the heirarchical Scripts Menu or not.
Shortcuts are great.
Use as many shortcut keys as you can. Remember that you can create your own scripts shortcuts keys scheme, and needn't use the shortcuts that have been assigned to the scripts you may have downloaded from here or gotten elsewhere.