Refresher, of what leads to what:
Circumstance
Thought
Feeling
Action
Result

and this email about "ending up" with pita clients.

.......

Here is an alternative:

Circumstance: Your client calls you on a Saturday.

Thought: "I only work with amazing clients."

Feeling: Curious, slightly puzzled, about why this client is still on your roster.

Action: Listen to the end.
Reply with "Alright, I'll have a look in just a minute, and listen, I'm so glad you called because my business is pivoting to work with only clients in ___ industry, so let's find you an accountant who is a better fit for you."

...

Meanwhile, your amazing clients, for whom you have time, space, and energy, because you're not burning bandwidth being annoyed by pita clients, get amazing results and truly love working with you. They tell their (also amazing) pals, "My CPA only works with people like us, so if you need a new one, call her!"
...

Result: You only work with amazing clients.

.....

Our thoughts show up in our results, one way or another.

...

The news is good: we can choose our thoughts.

Even better news: it's simple to do.

Just, pick.

Pick the thoughts that will tie directly to the result you want.