You need to think beyond the initial sale and look at the revenue you get from a customer during his/her entire product usage life cycle (from initial purchase to replacement). Look a the maintenance, training, and ancillary (e.g., accessories) purchases. Also consider whether this customer is a high profile account that influences other purchasers.
One of the most brilliant examples of this "customer alignment" is Amazon. Amazon does not try to make an obscene profit from its Kindle e-readers and tablets (the profit margin is most likely very small). However, that initial purchase has drawn the user into its ecosystem where the user continues to buy e-books, games, and streaming media. To top it all off, Amazon recognized that the Kindle has an additional continuous revenue stream – the advertisers whose ads appear on their discounted versions of their tablets! Simply brilliant.
So think beyond the initial purchase. Focus on how the user will use your product and his/her needs during that time. Grow and build your ecosystem to accommodate that use and your revenue will grow correspondingly.