Now, don't take this the wrong way, I know that this is the best way to REALLY see what progress is happening. The scale can lie, lie, lie and measurements are great but until you compare it to other measurements you don't really SEE the results. Pictures, though, are something that you can not deny.
You look in the mirror every day. You know what you look like in the shirt, dress, or pants that are fitting more comfortable. You are feeling great, knowing the your goals are becoming a success! "Yeah Me!", you tell yourself but then that dumb trainer tells you to take progress pictures. Side pose, front pose and the ever dreaded back pose.
That is when all truth comes out!! "I can see the difference from the last ones, but I thought I was doing better then THAT!!" This is why they are so very important. The pics do not lie! I hate it when I have to do them and I'm sure my clients do too. I have to tell you, when I see those pics and I am not happy, I use that and build my fire!! I want MORE MORE MORE improvement!
Gotta go now and prepare my meals and hit the gym! :-P