Things you didn't know about: The Inventory You can drop entire stacks of items using Ctrl + Q! This is usally much quicker than dragging them out... This method can be used in creative mode if you need a lot of something in a hurry Most likely cookies :) In creative mode, you can press the Middle Mouse Button to quickly get a stack of something in already in your inventory! This is especially useful when filling up dispensers or chests. Grabbing and then dragging items while pressing the Right Mouse Button will drop an item in each slot. Using the Left Mouse Button, will divide the all the the items epually across the slots. If you need to rid of some items in your inventory in creative mode, you can simply press Q to remove them. You can also press Shift + Right/Left Click on delete slot in the inventory tab to delete your entire inventory. You can double click on an item to gather all the items of that type.
In creative, you can use the Middle Mouse Button to select the block you're looking at and put it directly in your hotbar. In survival, this action selects the block you're looking at, if it's already in your hotbar. A common but important one: Use Shift + Left Click to quickly transfer items. This also works with armor! Click to learn more! What's in the chest?.