A few people have called and emailed about this post. It was part rant and part lesson. The rant is what it is. But the lesson is this: Many of you have clients that make you very little money, but cost you a great deal of time and energy. Dump them! You are not Ma Bell.
Remember Paretos' principle: The 80/20 Rule. You want to focus on the 20% of your clients that make you 80% of your money. You don't want to burn up 80% of your tech's time with the lowest paying 20%.
We are still seeing that Dial-up is hugely profitable - moreso than DSL by far. Most margins on DSL are $10 max. Unless that client is buying other services from you, if it is problematic -- sell that account to the ILEC. (We pay $100 per each BellSouth FastAccess Biz account).
Life is short! Have some fun... Because your customer can feel that fun... And people want to associate with fun people - not stressed out, cranky cynics!