I don't exercise, so I don't know how the following tips will affect it (I suspect it might make the exercise difficult), but I've had plateaus and hiccups, where for 1-2 weeks I lose nothing, and even gain. I also sometimes gorge (particularly during holidays or family outings), so what I do after is:
Fast - I take vitamins and plenty of water, but for the entire day, I only take two servings of ELOO/SW/CO (whatever I'm currently using) - I normally take 3 tablespoons of CO these days, for example, so for a fasting day I take 3 in the morning and 3 in the afternoon/night. I sometimes add a bowl of cereal somewhere in there if my mouth feels lonely, or munch on peanuts.
This always results in a boost in weight loss - maybe it's only liquid, muscle, or whatever I ate the day before - but it helps get me back on track, and the AS is very strong the next day, so I eat less then too. It especially helps with plateaus.
You could try something less radical - taking one meal, with the ELOO at the other end of the day. If this is too hard at first, try upping the dosage a tablespoon. Properly done (as Seth points out in his book), you should have absolutely no need for food, only perhaps cravings, so if you've found the proper dosage (which varies person to person), this semi-extreme diet, at least for a couple of days, shouldn't be hard to achieve.