Health advice

Alright ladies my dr told me not to get too excited till i was out of my first trimester, and i was wondering what kind of health advice i could be given. What to eat, what not to do, what to do, ya know, things to just help get through this first trimester with a healthy little baby. I smoked but when i found out i was pregnant i have cut down, basically not smoking anymore. Went from a pack a day to 1 cig yesterday and im not craving them like i was afraid i would. What else can i do to improve mine and my babys health?