Since the day I was banded, I have been journaling. I do it the old fashioned way, with a pen and notebook.
I write down what I ate, calories, grams of protien, what time I finished (helps for drinking and the 30 minute rule) and to gauge times between eating! I also mark Vitamins taking, cause I tend to forget, and minutes exercised!
It really does keep everything in check, and becomes second nature after a while....if your working and don't really want people to know, just carry a small note pad in your purse, and transfer it when you get home. It really is a great way to keep track of your journey!
I also write my beg. weight , todays weight, pounds lost, pounds to go, and goal. Good luck, and what ever way you do it, computer or notebook it will benifit you!