If your goal is "general health" and you're doing okay, you're lucky (or you should set harder / more specific goals!) But as an example, I thought I was eating well, but when I started tracking my calories for a few months, I realized I had underestimated my daily calorie intake by about 400 calories, and I was still eating way too many carbs for what I considered to be a "low-carb" diet.
I'm also on Fitocracy (was using spreadsheets before) to track weightlifting - tracking is a necessity for lifting IMO.