1. House Elves (Harry Potter)
2. The sonic screwdriver (Dr. Who)
3. The holodeck (Star Trek)
4. The Rocky Horror Richard III (The Thursday Next books)
5. The Jedi Mind Trick (Star Wars)
6. Spontaneous production numbers (almost any musical ever)
7. Elves (the Middle Earth kind)
8. Tailoring by Ghastly Bespoke (the Skulduggery Pleasant books)
9. Tony Stark (Iron Man)
10. Wands (I tried to pick only one from Potter. I really did.)