You mentioned in one of the comments that you get a lot of business from referrals, but don't track the number of referrals in any way. Would it make sense to have some sort of rewards program, e.g. one month off for every customer someone refers to you? I don't expect that would do much for you in the (presumably most lucrative) enterprise space, so maybe it's not something that would make sense to spend time implementing, but I could imagine it working out quite well with e.g. owners of massage parlors.