I've got them on a track on the rail, like this;
which runs from about midships right back to the pushpit. Very useful, particularly when coming into a berth.
If you have a cleat or fairlead aft of midships you can come into a berth using just one rope, and then take all the time you like to sort out your other mooring lines.
If you pass a rope with an eye in it though the cleat or fairlead, and hold the eye at the end of a boathook, as you come into the berth hook the eye over the mooring cleat or bollard which you intend to use for the aft breast rope, and take the strain round the sheet winch to help stop the boat.
When you are happy with the position of the boat, leave the motor in forward gear on tickover, and the boat will lay nicely alongside for as long as you want, you may need to push the tiller over towards the side you're tying up to keep the bow out.
If you have a permanent berth you can make a rope just the right size to fit between sheet winch, boat cleat and berth cleat. This method makes coming into a berth singlehanded so simple.
You can do the same thing with a cleat or fairlead amidships, but you must keep the tiller towards the tying up side, or the bow will swing in, and the stern will swing out.
Hope this is of interest.
Tim