Here are some possibilities:
Informal:
* Normal: "That's my normal routine."
* Regular: "I'll have my regular, please."
* Standard: "That's the standard procedure."
* Typical: "It's a typical day."
* The norm: "This is the norm around here."
More colloquial:
* The usual: This is quite common and informal, but not strictly slang.
* The same old: "It's the same old, same old."
* The usual suspects: (This is more specific and usually refers to people.)
Regional Slang:
* The regular: (Common in some parts of the US)
* The usual deal: (Common in some parts of the US)
The best choice depends on the situation and who you're speaking to.