Location, location, location: If your sign isn’t visible, it’s worthless, so put it at a prominent spot. If you have is a small sign, place it at eye level. The best-case scenario is that your sign reaches the customer who is already thinking of that topic (e.g. billboards along the Interstate for gas stations or recycling information on trash can lids).
Less is more: Don’t clutter your signs with words; people don’t want to read an essay when they glance at a sign. Use the minimum amount of words you can and still get your point across.
How do I look? Your sign should be visual appealing and attract attention without being gaudy. Therefore, make sure you think carefully about the colors and typeface that you use on the sign. If you are advertising with your sign, emphasize your corporate brand by displaying your logo on the sign.
Find the balance between consistency and diversity. You should be consistent enough with your signage that repeated exposure can occur. On the other hand, small, periodic changes may make the customer pay added attention to the sign.