Formal:
* "Dobrze mi się powodzi." - This is the most literal translation and implies a good overall situation.
* "Jestem w dobrej formie." - This means "I am in good shape" and can be used to describe both physical and mental well-being.
Informal:
* "Dobrze." - This is a simple and straightforward way to say "good" and is often used in casual conversations.
* "Idzie mi dobrze." - This means "Things are going well for me" and emphasizes a positive trajectory.
* "Nie narzekam." - This literally means "I am not complaining" and implies that things are good enough.
The best option for you will depend on the specific situation and your relationship with the person you are talking to.