Tape or Weigh?

I've been researching several diet and health sites today regarding the best way to measure my weight loss success. And truth be told I'm left a bit confused. Some sites say tape don't weigh because the scale isn't the best (most accurate) method specially if your exercise program is heavy into strength training (aka muscle mass increase). Other sites say the scale is the best indicator of your success and yet a handful of others believe that both the tape and the scale are needed. To be on the safe side I will start using both and reporting my tape measurements in my Weighting For Skinny weekly updates.