I make charts at the moment - it's helpful.
I do 2 weeks at a time, and I will modify it as I get back into this - I'm totally out of it at the moment, but slowly starting to pick up the pace again. Every chart has Breakfast, Snack, Lunch, Snack, Dinner, Snack. If I don't eat it (and I try not to eat the snacks, especially the late ones), I leave it blank. If I eat it, and I eat what I determine to be a good amount of good stuff at the time, I get a tick. If not, I get a cross. There are no hard and fast rules about what I get a tick for and what I don't - this is particularly important as I live in a catered residence hall at a university, and so have no control over what is served to me for my meals. I just have to learn to listen to my body - it's it's happy, and I've eaten my veggies and avoided fried things etc, I get a tick. If my body tells me I've eaten too much, or the wrong things, I get a cross. At the end of the day, I get a grade - A is all ticks, P (pass) is 1 cross, F (fail) is 2 or more crosses. If I get an A, I also get to add a sticker to my star chart - when I get enough, I get a reward, like maybe new clothes or something. At the end of 2 weeks, if I have more pass days than fail days, I get a bonus 2 stickers for my star chart.
This is really helpful to me, because it links food to other things I find really important. As a uni student, grades are really important to me, and by grading myself on my food intake, it makes my food intake more important to me too. This is especially good, since I'm currently not 100% into it, and this is helping get my motivation back to a good place. Surely if I can get a Distinction on an essay, I must be able to get an A on my food day, which is really a lot easier than an essay. It's also really important that I've got lots of flexibility - I've got an active social life, and often I don't have a huge amount of choice about the food I eat. I try to make it more about portion size than type of food sometimes, which can be cheaper anyway, and that's also good. I'll make it harder to pass as I get better at sticking to it, but for now, what I need is a loose plan that I care about.
And it works, too.