Help is a good word to start a slogan with, especially public service or safety slogans, but it can also be a good start for an advertising slogan.  Here are some examples:

• Help make him all the dog he's meant to be (Ken-L-Ration)
• Help yourself as you help the country (Savings Bonds)
• Helping people communicate (Addressograph)
• Helping your  product speak for itself (Marken Machine)
• Helps build strong bodies 12 ways! (Wonder Bread)
• Helps you do things right (Stanley Tools)