Warning: Do not attempt to use these techniques on anything important, like world-changing events or your laundry schedule. You have been warned.
Loop Folding: The Ultimate Time Warp is a great place to start your journey.
Multiverse Folding: The Art of Branching Out is a more advanced technique, but the views are simply stunning.
Paradoxical Folding: Where Time Goes to Die is not recommended for beginners, but it's a great way to learn about the dangers of time travel.