Opening rune backpacks without opening your main
This is very useful when you need to quickly open a backpack. Use a different type of backpack as your main backpack, UH backpack, manafluid backpack, etc... For example, use camouflage for your main backpack, blue for UHs, and yellow for manafluids. Make a hotkey with a blue backpack. When you press the hotkey, it will open the first blue backpack it finds - your UH backpack!
Remember, make sure the backpack you want opened is in order of the first of its type!