How to gain followers on twitter as a business?

[Frank]

Don't use a service..thats just going to get you a bunch of followers that don't care about your store. Plus you run the risk of getting your account banned.

Why not post some notes or flyers around the school letting students know about your new twitter account? Also, I would post something at the checkout counter so as people are checking out they see it. You could also put a slip of paper with details about your twitter account into every bag after someone purchases something.

Are you planning on running any specials or coupons, then posting these on twitter? This could be a good reason for people to follow. Have your flyers etc say something like: "Keep up to date on our sales and specials we run, follow us on twitter"