Dieting in theory sounds fine but how can you manage without your favourite foods? It really depends on what your favourite foods are. The good thing is that taste buds can be trained to dislike either high-sugar or high-salt foods. This process takes about 2 weeks to do.
If this process doesn't work well you can incorporate your favourite foods in to your weekly diet plan and just allocate a number of calories for them each day. Just remember the formula you need to burn more energy than food (energy) you consume.