These gems saved me a ton of time...not to mention my woodwork and walls! They just tap into the top of your wooden window frame and your done. No drilling or measuring. Just hang your curtains! Kwik-Hang Curtain Rod Brackets.
french madamoiselle - bed cornice DIY version - use an inverted decorative shelf - select fabric panels, could be extra long drapery panels, pretty sheets, burlap - gather & staple to shelf; cover underside with plain fabric to hide the raw edges & staples (add figurines if you want cherubs, birds, bunnies, etc)