I don't charge family but i do charge friends but at a discounted rate. I used to do lots of free work when i first started but have subscribed to the theory of not giving away my services for free (except family). The free work was rewarded by the "payment" of building both my resume, photo library and experience level.
And my discounts to friends has been as low as product useage cost to up to 25% discount off full price. Depends on the relationship. My friends are gainfully employed and expect to pay for a relatively high level of expertise. They are more than willing to pay me for something they can't do or want to do and i get at least compensated modestly for, at times, spending anywhwere from 4 to 10 hours of hot, sweaty work.
Again, there was a time i gave away work for free and i got paid with intangible benefits. Not anymore and we should all recognize our time is not only valuable but a skilled commodity people are willingto pay for.
That's not to suggest i disagree with cleanmycorolla...a barter arrangement is still, in my mind, getting compensated. I have also enjoyed the occassional favor for a favor.