The Renewed Diet and Dealing With Bounces and Plateaus

I don't know what it is about my latest digital scale--my latest scale measures to fifths of a pound and it's not unusual to see consecutive weigh-ins to differ by up to a pound or more. Usually I look for a repeated weight confirmation before registering my weight, first thing in the morning.

About 10 days back, I reached a yearly low--only to see my weight literally bounce up over 5 pounds overnight. I was stunned--it's not like I binged on my diet, ate too many carbs, etc. I quickly dropped off a quick 1.5 pounds, just to see me bounce back up a pound. For most of the rest of the period I dropped down a half pound or so, except for another bounce or two. I finally got back down to my starting point yesterday and went down another half-pound or so to another diet low this morning. Obviously I hope I have another 2-3 pounds to go on this whoosh. I was hoping for a steady 1.5-2 lb. lost a week; I still recall my successful 2003-2004 low carb diet when I seemed to lost about 3.5 lbs. a week; I stalled a few weeks shy of a major anniversary for my folks and basically took a break; one of the problems with a low-carb lifestyle is that it can be boring. The problem was when I tried going back on the regimen  I stalled out again. I don't think I ever completely abandoned the lower-carb lifestyle, but most of the 90-odd lbs. I had lost eventually returned. I have attributed some of it to a lower exercise rate and a thyroid deficiency; at one point over the past year, I developed a painful heel spur, enough to spend $40 on xrays. Did overeating play a role? Clearly yes. At some jobs I ate out more, and in IT pizza is a staple for business meetings etc.--I didn't necessarily restrict myself to one slice.  My Mom would mail the occasional care package of cookies or other treats around holiday times. During the first few months of my Nutrisystem diet, I quickly took off 40 lbs. but once again I stalled; I'm not sure whether my body at some point just adjusts to the new normal. The problem is sticking to the diet once I've stalled or gotten bored.