I'm doing layout design, pro bono stuff for my uni, and I haven't done much designing lately. But back when I did my high school newspaper I remember what I was told: your pictures must be in .tiff ...
So I have a friend who wants a vector image done for a wall print in their karate studio. But they want the image 8 ft high and 5ft long. Do you actually make a file that big then draw the design then ...