I'd like to start tracking my diet, with a goal of understanding if I'm eating enough, getting close enough to the right amount of protein, fat, carbs, etc. But, I don't want to spend 10 minutes weighing every meal (Impossible in a restaurant) and entering every individual component of my meals into a diet tracking app (find the entry for hamburger patty, estimate the size/weight, look up the bun, look up and estimate each topping, etc). There's millions of phone and web apps that can do this, but if I have to spend 10 minutes tracking each meal, I'm probably not going to stick with it.
The question is, can you get reasonable accuracy on your dietary intake from rough estimates, and secondly, if so, what's a plan/solution/system/technique for doing this?