Be careful offering coupons and cutting prices. If you're constantly doing this, you're devaluing your product. I've seen too many hosts offer 20% off, directly on their sites as an almost permanent feature. If the client is already on your site, rarely do you need to offer a discount (unless you're trying to push a particular package).
Too many places offer 75% off type packages and think it's a good way of getting clients - and maybe it is - but if the client is only paying you $2.00 at the end of the day, you're not going to be able to pay the bills. You're better off targeting a different industry nice and dominating it.