Each time I needed to lose the baby weight, I stopped eating after 6:30 p.m. five nights a week. The other two evenings were reserved for nights out. Most of what I'd eat at night was junk food anyway, so it took only two months to get my pre-baby body back..
As a general rule, arrive at the airport no later than two hours before your domestic flight is scheduled to depart. This is somewhat later than the typical suggestion of three hours for an international flight.
Generally speaking, you must arrive at the airport one hour in advance of domestic flights and two hours in advance of international flights. What you should keep in mind, however, is that unless the international portion of your travel is nonstop from your origin city, you need only follow domestic flight guidelines.