Spend most of my time on non-billable items
I find myself spending half the day on non-billable items. Things I do a lot of are:
1) maintenance of my servers
2) researching and playing with new technologies that I may want to include into my business
3) evaluating the processes of past projects to see if I met my objectives
4) devising strategies to improve on item 3)
5) networking and communicating with talented individuals (like scouting out talent)
6) misc. stuff like updating my website, finances, invoices etc…