JETPILOT beat me to the punch here.
(1). Go out and buy the 2000 FAR/AIM by ASA. It will set you back $16.00. I think Borders and Barnes and Nobles have it if you don't want to drive out to the FBO. If you are real lazy and want to spend time feeling sorry for yourself more, you can order it off Amazon. ISBN 1-56027-327-0. Review the Suggested Study list on pp xi--xiv. This will be your first step.
(2). Don't necessarily quit your day job at Ralph's, yet. Get your ass out to the FBO and introduce yourself to the Chief Flight Instructor. Bring your logbooks. Bring a good attitude. Maybe the FBO will hire you as a part-time fueler or a ramper. This will give you a big discount as you get re-current. Also, you never know whose Cherokee 140 you might be fueling--it may just be John Smith's from UPS, and he may write you a letter of rec in a couple of years. Let the flying service know your goals. I would bet you any money they are looking for instructors. If xxx Flying Service has what they need, yyy on the other side of the flight line is hurting. It's a revolving door and the job market is there. You need to build up your hours, they need teachers. Hmmmm... maybe they just might work with you!
(3). If you don't want to go the CFI route, there are all sorts of schools with flow-throughs to the regionals. You pay, but you get an interview. Get a student loan. You are well ahead of the game, you won't have to ab-initio like the rest.
(4). All this "I'm too old" crap is just that: C-R-A-P. I fly with an F/O, for instance, who is 45, and upgrading next month. He took his first flying lesson at age 34.
(5). Next thing to is get into back into the flying mindset. Get out your whiz-wheel, your old manuals, and sectionals. Bring them to work and study them on the crapper and during breaks. Start thinking of yourself as a pilot and not a grocer. Your job at Ralph's is now just a means of getting you back into the cockpit. Start coming up with your financial plan. Hell, you work at Ralphs, stock up on the Ramen noodles. Get yourself the ATP book while you're at it too.
(6). Get a first class medical. Seventy-five bucks.
(7). MAN! This is the fourth time that I am plugging this.....Doug Taylor. Go to his site. http://www.jetcareers.com. Get a subscription to AirINC.
(8). I don't know where you are hours wise, but I do know that there are regionals that may consider you if you have 500tt with 100me. From what it sounds like you could be anywhere from 9--18 months away from flying the line.
(9). Lastly, I am sorry to be harsh. I worked at an FBO as a ramper and front desk bitch in my spare time in college. Flew in the military. I saw a lot of instructors. The ones with the good attitudes that I keep in touch with fly for: (UPS[DC-8Capt], Northwest[757fo], and my flight instructor there is a capt on Amazon jets for American Eagle). The one with a poor mouth and bad attitude is flying King Aires for a paper company. Get rid of your sad attitude and start thinking positive and what could be. Fly a good heading and you'll get where you want and have fun in the process.