1. Get her worried by saying your brother's gone!
2. Spit on her until she gets angry!
3. Chi-block her.
4. Keep on saying her water bending is stupid
5. Throw her in the river at night.
6. Take all her stuff and use them.
7. Poke her on the face or the hips.
8. Whisper in her ear Katara is ugly
9. Get Toph to throw Katara in the air and land her on a rock!
10. Run away on appa and never come back!