How do you say 'what are you doing tomorrow' in Japanese?

There are quite a few different ways to express 'what are you doing tomorrow?' in Japanese. Some of these are:

• 明日は何するの？ (ashita wa nani suru no?)
• 明日何をするつもã‚Åなの？ (ashita nani o suru tsumori na no?)
• 明日何をするの？ (ashita nani o suru no?)

These are all very casual. A more polite option would be 明日は何をしますか (ashita wa nani o shimasu ka).