I would second this whole-heartedly. If you track time, you will find that some clients will question every single second. "So you spent x minutes finding stoc

I would second this whole-heartedly. If you track time, you will find that some clients will question every single second. "So you spent x minutes finding stock images?! That means I paid you $x just to look?!" Just set KPI goals that you'd like to be measured against and track performance on a weekly basis.