Month 3: Go Cardio Crazy
OK, you don't really have to wait until month 3 to engage in cardio. In fact, a healthy mix of cardio and strength workouts is ideal to getting your body in buff bridal form.
The benefits of cardio are numerous. If you really put out the effort, you'll burn a lot of calories in one "sitting," so to speak. Cardiovascular exercise also benefits heart and lung health (and really, how you look is secondary to your health, even during wedding prep). It will also keep from getting too fatigued on your wedding day.
The key to sticking out any workout plan is to find something you'll actually enjoy doing. If you detest running, but like to shake your money-maker, hit the gym for a cardio dance class or spin class a few times a week. Or, if you enjoy pounding the pavement, sign up for a 5K race or half-marathon, so that you're motivated to train regularly.