I created a "Weekly Health Journal" form to record things like my weight, whether I take my vitamins, how much water I drink, how many servings of veggies and fruits I eat, whether I exercise and what kind and how much for each day of the week. It's a two-page word document, intended to be used double-sided, one page per week. The form has a spot to record weight each day, but I don't intend to weigh in every day. Once a week or so is sufficient in my opinion.
It's vaguely inspired by
Flylady's Body Clutter Investigator, but vastly streamlined. Her system is one single-sided page per day. That's too darn much paper.
ETA: Ooooh. I should add waist measurement, since that is what I care about, not weight per se. *Goes and edits document*