How do I take care of the st. augustine sod I had laid down today?

My back yard was a disaster. I thought I wasn't watering my lawn enough because I started seeing dead patches in my st. augustine lawn. Next thing you know, the entire lawn was dead....so I resodded the entire yard. 3 months later that lawn was dead from what I thought was underwatering...then a neighbor showed me that I had chinch bugs. He said that if I would have treated for the chinch bugs I would have saved the lawn. Well, I treated the yard with Ortho lawn insect control granuals that say they work for 3 months. That worked into the ground for about 3 weeks. Today I had the dead lawn removed and new sod put down. Of course it looks great but it looked great last time. What do I do to make it work this time? I'm in Jacksonville Florida. It was still 80 degrees today. I watered the sod heavily today and plan to water in everyday for about 10 days to help it catch. What do I do to make sure the chinch bugs don't come back? Should I put granuals down again? Do I fertilize? What do I do? I keep getting different opinions and I'm just scared that I'm going to lose this lawn. At $800 bucks a pop it's very expensive. One other issue that I have is that there were weeds in the yard. Most were removed before the sod was put down...but I know some were just covered with the st. augustine by the workers that laid the sod. Any good advice will be very welcome. Thanks!!!!!!!