I bill by the hour, not the minute. If I work 10 mins on something and do nothing for the other 50, you are billed an hour. Frankly, this is how most clients have actually wanted it. They think in hours (or days) not some subdivision of them. And yes, thinking about work is the same as doing the work. It's all billable time. As far as your rate, I always bill as high as I can without pushback. Where is that level? Yo…
I find it hard to believe anyone wants to over pay for your time by 6x what it's worth. I understand rounding up. But I don't understand working 10 minutes one day, billing for an hour, and then working 10 minutes the next day and billing for two hours total.