Don't go on a diet, atleast, don't go on a diet that means restraining yourself from eating
Try to figure out what your basic needs are, for most men this is 2500kcal, to cut (lose weight), you can go a bit under that, never go less then 500 kcal under your basic needs
Eat 5-6 small meals a day, and have a good mix of all the stuff the body needs. The reason for this is that you want your body to know that it can burn fat, and not store it(=bodyfat) for later.
Your body wants to survive, for when it gets cold and you don't have any food available.
A good guideline is this: Try to eat the food that is closest to nature. Peanutbutter = good, snickers with peanuts in it is bad, it's B-quality food
if you want to snack, take something that has low BAD fat, some people think all fat are the same, they are not
there is a lot of good material available on the internet about the right mixture, i would love to explain it to you but most words I really have no clue what the english words are
Also, try to do sport. If you want to lose weight you should try to gain muscle by doing fitness (8-12x3 sets),
cardio is good too, but you have to hit the right heart rate, running/spinning/crosstrainer and especially row (you know, that thing they do in the water?) are really good
Cutting on food and eating way less then you need puts your body in starvation mode, which means, once you quit that 'diet' your body thinks OHHH WE GET FOOOODDD, SAVE THIS NOW, BECAUSE WE WILL NEED IT IN THE FUTURE, and thats whats called 'jojo effect', not good, and very demotivating
Poker related: Fast diets are short run material. People want results now and thats why those 'diet products/diet philosophys' work so good.
You have to think about the long run, which doesn't sell so great, because it's hard work, or atleast harder work.
But once you got the lifestyle down, it's easy.
Also, don't go for a balance day where you eat junkfood all day long. Go for cheat meals, 1 meal once in a while in your normal diet where you just don't be so strict about it.
Those cheat meals help you, because it gets your metabolism up again
Maybe a lot more then you wanted to hear, i just wanted to give you some food for thought (get it? food for thought)