Although there are pros and cons to tracking your health data too closely, if and when you choose to weigh yourself, you should be doing it with the best, most useful scale. I personally use an iHealth Nexus, and I absolutely love it.
And since it's on sale during Amazon's Prime Day, I'll tell you why, in case you decide you might like it too. (It's great, but I still would have rather paid less for it.)
iHealth Nexus Smart Scale for Body Weight Bluetooth, Digital Bathroom Scale Body...