I've set myself 6 daily billable hours, with an X value per hour. However, on most days, I only work 2-3 hours and spend the rest of my time (5-6 hours) waiting for client responses.
Should I reduce my billable hours to 3-4? That would significantly increase my hourly value, but I'm not sure what to do with that increase.
There is a relevant answer to my question here, but the accepted answer basically says that you can do other tasks while waiting; I, on the other hand, cannot. When I have to multitask on multiple projects at the same time I make a lot of mistakes, and I mean it. My service quality significantly deteriorates when doing so.
So, if you have any suggestions or insights that could help me bill my work hours more accurately while also focusing on no more than one project, it would be greatly appreciated. If what I'm looking for is the holy grail, I'm open to other ideas as well.