What is the proper diet, exercise, lifestyle to help my baby develop?

Congrats. Make sure you are taking prenatal vitamins or a good multi. Eat healthy foods - whole grains, lean protein, fruits and veggies, lots of fiber. Make sure you get enough fluid - you need more when you are pregnant. Get enough sleep. Avoid exposure to any chemicals you don't need to be around, including smells or physical contact. Exercise regularly - you can usually do whatever you normally do, unless it is something that would be dangerous to your belly after the first trimester. There are lots of resources online for what is safe or not during pregnancy. You can try Babycenter.com for a pretty good list. Make sure you take time to be with your husband, and enjoy your time as much as you can. Don't sweat the small stuff. Remember most if it is pretty small. Read up on pregnancy and birth so you can make some informed choices about what you want to do. Good luck.