1) Remove hardware and knobs and such. 2) Get some vinegar or strong cleaner and remove all grease, grime, and dirt. 3) Get some fine grit sand paper and scuff up the surface to make the paint stick better. Sand in one direction and again, not hard just to take the "slick" off the wood. 4) fix all holes, cracks, and other blems. 5) Apply a good primer like Zinzer BIN. Apply a light coat and allow to dry. Then re coat and allow to dry. Apply about three coats or until the old color is hidden. 6) Lightly sand now, but not to remove any primer, just to scuff it up again. 7) Now, add your finish coat. Get a good brand of paint. Not one from a home center. Remember, its better to apply many coats than few thick coats. I would apply two coats for sure. If you have a spray rig or even a wagoner spray gun, I would do this on the inside. 8) I would use a latex paint in semi gloss or enamel sheen. Remember, oil based paint will yellow after a while and it will chip. This is why I am recommending latex paint.