Early this year we were enrolled in the TSA PRECHECK program for free by American Airlines because of the amount of travel that we do.
We have been on a number of trips so far this year at different airports and man it is a dream.
No line, I just put my cell phone in my computer bag, leave my shoes on, no need to empty pockets, leave the computer in its case and just walk through.
leaving San Diego last week we walked past about 50+ people in the regular line and we were the only ones in PRECHECK.
You can enroll with an online application then go to one of the centers, get finger printed and pay $85 for 5 years. In my opinion well worth it if you travel even a fair amount