For the first few weeks I'd advise plugging in your daily food intakes into a nutrient calculator such as the one on Nutrition Data's site. There you can get a better idea of your overall fats, carbs, vitamins and minerals for the day, and which of those you may be lacking (Folate & B-vitmains are important ones). Do not pay attention to the so-called "Inflammation Factor" number, that is a load of crap.
Calcium and some added magnesium (to offset the cup of coffee I have in the morning) are the only supps I take daily. Multivitamins tend to get peed right out of your system, and should not be needed if you're eating a wide variety of foods every day.