What is the prefix of to do something that you do?

There isn't a single prefix that universally means "to do something that you do".

The closest prefixes depend on the specific context:

* Self-: For actions you perform on yourself, like "self-reflect" or "self-care".

* Auto-: For actions performed automatically, like "autopilot" or "automatic".

* Re-: For actions you repeat, like "re-read" or "re-evaluate".

It's important to consider the specific meaning you want to convey.

For example, if you want to say "to do something that you regularly do", you might use "routine" or "habitual" instead of a prefix.

Could you provide more context about what you're trying to express?