I went out an got some decorator's canvas and slipcovered the old 70's armchair. This was before my blogging days so no step-by-step photos. It is quite easy though. You measure each part of the chair, cut out a square of fabric, pin the pieces together with wrong side of fabric facing out (I use safety pins), lightly draw in pencil the stitching line and then sew!
I realize that after looking at your room through a photo you notice things like the jumble of cords in the corner and our wedding photo that I thought I hung low enough still looks too high!