If you are talking a bathroom fixture drain, like for a shower or bathtub: hire a State licensed plumber in your area. If you are talking about installing a floor drain in your bathroom (a very unusual thing to do), the answer is the same.
Regarding a ceiling or side wall moisture exhaust fan, that is something that you will normally need to assign to a State licensed Mechanical contractor and.or Electrical contractor. The easiest way to install a bathroom vent fan, if it is along an outside wall, is a high side wall vent with a damper and insulated housing/short duct. You need to watch out for structural members like wall plates, studs and other members and make sure that whatever you have cut has their loads redistributed to other structural members that can handle those loads next to them. If your only means to exhaust is through the ceiling, do so, then turn toward the outside wall or soffit as soon as you can. You may need to install a horizontal chase to accomplish this if your ceiling does Not have adequate clearance for the exhaust duct.

A diet that includes at least 5 servings of fruits and vegetables and 3 servings of whole grains a day. If you eat meat and dairy, choose lean meats and low-fat dairy. Limit the amount of saturated fats and trans fat, and choose foods high in omega3 fatty acids such as fish (salmon, tuna, mackerel, sardines), and nuts. Also add a high quality, stable fish oil supplement to your daily regime, such as Eskimo PurEFA fish oil. Learn more about PurEFA go to www.medicine-plants.com/store/eskimo/