My very first post! So how do you guys know when these cheap fares will come up? I am traveling in about 10 weeks. Am I too late to get these cheap fares? Tell me the secrets!

Basically, start checking fares - daily. Check Airtran, Jetblue, Southwest websites directly, check Orbitz, Expedia, Kayak - the major travel sites. Sign up for Southwest's Ding! alerts. You'll soon get a good idea of the lowest fares available. Book when the price is near to what you want to pay, then hope for a price drop (depending on the airline / site, you might get a rebate or credit, but watch out for change ticket charges).
If you can fly out of various airports check them all - you'll see different rates. I could fly from BWI or Dulles, both about three hours drive from home, but prefer Pittsburgh, about two. BWI and Dulles are almost always cheaper than Pitts, but the less driving I have to do at the end of a trip the better.
Typically, the closer to your flight date the more expensive tickets get (especially if flights are getting full), but even that's not always true: Southwest uses the Ding! system to fill planes with a lot of empty seats, often within a couple weeks of departure dates. This can work to your advantage, especially iif you can be flexible with your flight dates, since the sales tend to be pretty date specific. Mid week flights also tend to be less expensive.
Airfares are crazy these days. I watched airfares for six months, and finally booked with Southwest on the first day they posted fares for the period Oct 31 - Jan 08. The fare I booked for the flight down jumped $40 within six hours of first being posted - that's how fast they can change. Airtran had $132 each way for a similar flight - this back in January - and that fare is now $89.
There are so many variables for getting cheap flights that it is hard to list them all, but diligence is the best strategy - as I said up front, check every day - even a couple times a day - until you find what you want. Good luck!