You have to limit your calories too, you could eat everything below 5% fat but you could still keep the weight if you eat enough of it. Try reducing your calorie intake a little and be patient, staying the same is better than putting it on
I tend to stay away from processed food, and use frylight instead of oil for frying.
For breakfast I'll have yoghurt or special k, lunch is usually what I've had for tea the night before with some salad, no eggs, weightwatchers range is quite good if I do have a craving, solero exotics (my absolute fave) are within the fat rules too
Frozen yoghurt is ace, yoomoo strawberry is so tasty!
There are thousands of low fat recipes online, as long as you stick to healthy portion sizes (weigh them so you don't feel tempted to eyeball it, I've found that I underestimate by a half) and unprocessed food you'll be fine. Sometimes I do treat myself to a fish finger butty if I want something easier though :p
Just try to make a meal plan then it'll be easier to stick to because you won't have to worry about what to make!
I've never had any side effects other than I seem to burp quite a lot after taking a pill haha!
If you're ever unsure when making a meal you can put the ingredients into myfitnesspal and it tells you the fat content, it even has a barcode scanner so if you're having something that doesn't have nutritional info on it it'll tell you you can still have things like spag bol or stir fry, as long as you use frylight