Hold vol+ & vol- along with the power button. Hold them all until it blacks out and vibrates twice. Then when you see "Samsung" release the power button and continue to hold vol+ & down until you see Clockwork recovery (Assuming you have it installed). Wipe cache partition and wipe dalvik (under "advanced"). Then make a backup. This way you will have a clean backup if you ever need to restore.
(you may need to reset your lockscreen wallpaper ;) )
Root explorer is also a good root filemanager. Astro doesnt let you set permissions its a good one if you do have root.
Hope this helps
360° Prada in the works....no eta's please, when it is flawless it will be released. Seems i need to make myself a better name, since after all the work ive put in over the past 2 years doesnt make me a recognized dev ;-(