Don't forget not to go by the scale. Muscle weighs more than fat, but is leaner. You may go down a size as you get more "fit", but gain a few pounds on the scale. Also, hydrate. If you start to dehydrate, your body overcompensates by holding onto the water weight.
I also agree with eating smart/healthy. I did a lot of biking this summer and I expected the weight to fall off like it did last summer. But I've been eating like crap (restaurant veggie enchiladas?--still not the best choice). I cooked at home the last week before our century and suddenly I dropped three pounds. (3 lbs I didn't have to carry for 100 miles!) Not that I could do it again if I tried!
Shake things up. Try something new. Those last 5 pounds are boogers
"Well-behaved women seldom make history." --Laurel Thatcher Ulrich
'09 Trek WSD 2.1 with a Brooks B-68 saddle
'11 Trek WSD Madone 5.2 with Brooks B-17