How to spend an entire day watching the extended version of all three Lord of the Rings movies back-to-back-to-back
It made me 
"Watching all three extended movies in one go is awesome, and even more fun when done with a group of friends."
How I did it: Organized a when and where with my friends and brothers, then got together and watched them all in a row. I've done this several times; it never gets old or boring.
Lessons & tips: Make sure you've got plenty of snacks and beverages handy! Blankets, pillows, and other comfort items don't hurt, either. It does take ~13 hours, give or take (for food/potty breaks).
