I am trying to make sure that I continue to gain strength and lose fat while maintaining/gaining muscle. To do this, I need measurements (You can't manage it, if you do not measure it) that I track over time. For strength, I simply use total load (sum of reps times weight for each set). For body composition, I measure weight and % body fat.
I weigh myself in the morning without clothes (last doctor visit, I was weighed and height measured with clothes and work boots on - I was 8lbs heavier and 1-1/2" taller!). Picking a specific time of day provides more representative results. Note that I am not saying accurate. Weight changes too much throughout day to worry about accuracy. The key is to have a number that can be used for tracking progress.
I measure bodyfat in the evenings after working out using a Tanita scale. I have found it to be as representative as skinfold measurements as long as conditions are similar from reading to reading (hydration levels, body temperature, etc.). I also have a Weider skinfold caliper I bought years ago. I have heard that the AccuMeasure is the best for self testing. From what I can tell, AccuMeasure made this caliper. I take these readings weekly using some of the tips mentioned here. Not sure why I bother taking both tests. I suppose it is "because I can". I already have the scale and calipers anyway. Again, the key is the trend and not the actual values.
There is another topic that also discusses using calipers.
BTW, I found a low priced AccuMeasure here.


