I don’t charge family and friends and those have been my last clients. Prior to that I charged $25 an hour to do logos and brochure work. I would figure out how many hours it would take me and then multiply it by $25 adding in hours for 3 alterations as well. Always get your client to sign off on that as approval in a contract, btw!
What is your hourly design rate that you like to charge clients? What do you think it SHOULD be at?