I'm not going to give you a specific diet to follow because (1) I don't know what you like to eat (and this is important; you have to enjoy eating), (2) I don't know how much physical activity you get, and (3) I don't know what food is most available to you. I will, however, provide some general suggestions that you can keep in mind as you find what diet works best for your goals and your life.
-Be sure to consume adequate nutrients. Don't neglect a food group; they each provide nutrients that are all essential to good health.
-Find the right balance among those food groups. Yes, eating tons of tuna and steak all day will ensure you get anough protein, but if you eat that much protein, chances are that you aren't getting enough of other nutrients. Balance ensures adequacy.
-Choose nutrient-dense foods. Get the biggest nutritional bang for your kilocalorie buck. You're headed in the right direction by eliminating soda, which is an empty-calorie food. Other steps you can take is opting for lowfat dairy and meat, eating fruit instead of candy when you are craving something sweet, putting flavored vinegars on salad instead of dressing, etc.
-Incorporate a variety of nutritious foods. This also helps to ensure that you are consuming adequate amounts of nutrients. Plus, variety keeps things interesting.
-Understand that it's sometimes okay to have foods that aren't incredibley, if at all, healthy for you. One treat won't ruin a whole diet full of healthy choices. Shame usually just ends up in a downward spiral anyway. Be disciplined but not so hard on yourself that you are miserable. Like I said, you have to enjoy eating if any diet is going to work for you.
These tips are very general, I know, but they are also flexible. Besides, it's impossible to tell you all particular aspects of a healthy diet. If you have specific questions about foods and/or nutrients, PM me. I'd be glad to help.
Best of Luck