Client Log In should be in line with all the other tabs. Basically in the same spot it's at right now, but lower, and maybe shaded a slightly different tint to make it stand out.
The newsletter part takes up too much space on the main page, I'd move away from the center, and remove the name field, since Newsletters are just that, newsletters, so you don't need the name. That way it wont take up much space.
For schedule an appointment, instead of "More" (being read as "more stuff to read") it should say Click here to schedule an appointment and center it in that field/box.
Consider giving a quote prior to making an appointment. After all, a customer would like to know how much a specific job will cost without having to navigate the site and add up costs. If a customer needs a computer setup and a data transfer, then obviously it's not going to be $90 +$80, instead would be a discounted price. Since you're not driving there and back twice.
At a later date consider adding professional looking photographs to give a visual appeal to the site. After all, all text and no photos, isn't quite as interesting having photos incorporated in.
Also, consider doing a favicon file. Many sites use it.