Call & go to all the Starbucks in your area. Collect all the grounds you possibly can, and till them into your soil. More is better, and a top covering of even more is better than that. Seriously. Go to EVERY Starbucks. Several times. A 50/50 ratio of soil to coffee grounds is what produced the best results in experiments. The grounds will loosen the soil, add nitrogen, and slowly decompose. And, oh yeah, they're free and natural, and even smell good!

Here's an interesting article regarding the use of coffee grounds as mulch, etc.

http://www.puyallup.wsu.edu/~Linda%20Chalker-Scott/Horticultural%20Myths_files/Myths/Coffee%20grounds.pdf

Link to article above.

Here is a link that might be useful: Coffee Grounds

I'm assuming you want to prep for planting winter rye grass. (You'll need to wait until next May to plant Bermuda seed).

I've attached a link to information on establishing a winter lawn that has seed application, watering information and maintenance. It was written assuming you already have a Bermuda lawn, so in your case just skip the 'scalping' section.

Good luck.

Here is a link that might be useful: Establishing a winter lawn