Changing your eating habits can be a huge challenge. One easy way to get you started in the change is to plan out a meal. Choose 1 meal a day for week. Find some healthy recipes (like the ones @ eatthis.com), make a shopping list, and prepare for the week. Each month add another daily meal to the plan, and in no time what you eat will have transformed, along with your health.
Take it one week at a time, and remember consistency is the best to achieve any goal.