This is one that hasn't been seen much before but pebble edging can tidy up your yard a lot!
Smooth bricks can make your garden look like it has been freshly renovated when used as an edge. The bricks can be made into nearly any shape to suit any garden.
Rock walls used as garden edges may not be the cheapest but they are certainly pleasing to the eye. It is definitely worth getting a professional in to install a wall like this.
Once again, brick edges come in all shapes and sizes.