The purpose of a sign is to let your potential customers know 4 things.
Who you are – What You Do – How are you different – Where to reach you
Most Signs are to be seen while driving and from a long distance. You only have a few seconds to get noticed, for that reason keep it sweet and to the point. Don’t put all 5 different phone numbers, don’t tell them the story of your business… instead be very specific and tell them exactly what they MUST know.
Avoid using script fonts as much as possible.