I did that recently and was astonished that it got accepted so easily. I merely got a "hum..." from some of my clients.

I wish people would have told me that years ago.

Every year, up your rate little-by-little.

One extreme example is there is this homeless guy who is a retired very good teacher who has a way of both teaching kids and correcting problematic behaviors. Unfortunately, he doesn't advertise and he doesn't up his rate ($20/hr IIRC). It's a shame.