Working Out for a Better Me - Week 2

Hey there.  So the first week is in the book and I must say that I didn't go to the gym, or exercise, as much as I wanted.  I must have gone once or twice during that first week.  Week 2 started yesterday and I made sure to hit the gym that night, no matter what time.  That time ended up being closer to 11 pm.  lol  Anyways, here are my stats so far:

Height: 5'8''
Weight: 169 lbs (-2 lbs)
Waist: 36 1/2 inches (-1 inch)
Chest: 41 1/2 inches (-1/2 inch)
Left Bicept: 13 1/4 inches (no change)
Right Bicept: 13 1/2 inches (no change)

Not too bad for one week's worth of working out.  Then again, you really can't give much thought into those 2 lbs that I've "lost".  For all we know, they were flushed down the toilet (literally).  lol  The one stat that really made my eyes wide is the 1 inch loss from my waist.  Really?  I lost an inch already?  I don't know about that one.  I measure myself across my belly button.  I know.  I know.  That's the wrong way to do it, but because I can't really find my waist, I settled for a "landmark" spot to go over and my belly button was designated so called spot.  lol  And I know that it's only been a week but I'm a little disappointed that there was no change in my biceps.  Yeah, I know... it's only a week, but still.  It's like I said in my previous post, I feel like I'm driven by numbers if I see the slightest of change, I may be more encouraged to get more done.  So far my routine is as follows:

20 minutes of cardio (alternating between elliptical, bike, treadmill)
Circuit strength training:
40 (or so) reps of bicep curls, triceps dips, shoulder press, chest press, butterflies, and rows.

Now... my so called circuit training is quick, but to the point.  One thing I noticed about people at the gym is they sit around a lot.  There's too much resting between reps.  I try to eliminate that by resting no more than a minute between reps.  So I'll start off  10 curls on each arm, then rest 1 minute, then do 10 butterflies, then rest a minute and so on and so on.  I think this method will confuse the muscles more than sitting on a single machine and doing 40 or so reps before moving on for an extended period of time on another machine.  My last set is always more than I can lift and will do only as much as my body will allow.  It pretty much means that when I leave the gym, I leave feeling pretty damn sore.  If there's flaws in this method, do tell.  I want efficiency and I want to do it right.  I also have some dumbbells at home that I'll start incorporating into my routine.  Maybe adding a few more reps before calling it a night.  Let me know what are your training methods, if any.  Or if you just wing it, how is that working for you?  Hope to hear from you soon.  Later!