Here are some other ways to say it:
* "Ako sa ti darí?" - This is a bit more formal than "Ako sa máš?". It's like saying "How are you doing?".
* "Ako sa ti dnes darí?" - This translates to "How are you doing today?"
* "Čo robíš?" - This literally means "What are you doing?", but it can be used to ask how someone is doing.
All these phrases are suitable for casual and formal conversations.