In 2000, my friend Kim told me about a book titled Body for Life. It is a 12-week nutrition and exercise program, and after reading it, I knew it was a plan I could follow. I lost 10 pounds in that 12 week period. To this day, I still follow some key points from the book.
*I eat small meals every 2-3 hours.
Each mini-meal includes protein and complex carbs, and I add vegetables to at least three of these meals.  This keeps my metabolism going, and it keeps me from being famished and then overeating.
*I incorporate speed work into my running. I maintain a steady pace, and then sprint at different points in my run. Speed intervals increase your endurance and speed.
*I weight train. While I no longer follow the exact weight training plan, I make it a regular part of my workout routine. Muscle burns calories, so the more muscle mass you have, the more calories you burn, even at rest.

You can get this book on Amazon for as low as $4.00. There is also a Body for Life for Women.