One of my favorite apps in my phone is My Fitness Pal. I highly recommend it if you are trying to lose weight, or are simply unaware of the nutritional value in most foods. My Fitness Pal counts your calories, tracks your exercise, and is user friendly!
I like this app because its simple to learn and easy to find the foods you want to log. I've searched some of the silliest, most specific foods (Veggie Burger No Cheese Half Wheat Bun), and someone else had already put it in there. (..I guess I'm not that weird..??) Also, if you can't find the food you want to log, you can easily add it to the database! Just make sure you have the facts right ;)
The trick to keeping a food log is being c o m p l e t e l y honest with yourself. If you had two cups of ice cream instead of the serving size (1/2 cup).. don't lie about it! This food log is to better yourself. No one else is going to see it [ unless you post it on a blog.. hmm ], so keep it accurate!
You are also required to create goals. You enter your current weight, goal weight, and activity level. This step also requires you to be honest with yourself because you have to choose if you are sedentary, lightly active, or highly active. If you're a sedentary person, don't claim to be highly active and give yourself an extra, unneeded 500 calorie bank.
Keeping a food log is a great tool for weight loss, but also just gaining nutritional knowledge! I learn something new almost every week from logging new foods. Don't just focus on the calories and fat. The point is to obtain a healthier lifestyle. That means choosing real foods that offer real nutrients.
I have found this app works best for me. What works best for you!?