Fill bare patches
It's easy to make bare patch fillers for your lawn. When reshaping the lawn, collect up the strips and place them 5cm apart in a compost-filled seed tray, then grow them on outside or in a cold frame. To replace the bare patch, cut out a square or rectangle around the area and, using a hand trowel, dig up the soil in the rectangle to whatever depth of soil your new turf strip is. Gently lay the turf, cut to fit, over the patch. Firm it down so that there are no gaps and your new turf is no higher or lower than your existing lawn.