day one wear just-washed hair loose and natural. don't pull it into a pony or clip-you'll risk creating dents.
day two tie a thick head band or silk scarf around your hair line(knot it at the nape of your neck) to hide any grease.
day three brush your hair to distribute its natural oils. then slick your hair into a low or high ponytail.
day four pull hair into a low ponytail, leaving the tail looped. then tie a do-rag or scarf around your hairline.
dirty hair tip: for a quick fix, blot a greasy scalp and rots with an oil-abscorbing sheet(the same ones that you use on your face).