Some airports have their own specific comms failure procedures in the AIP aerodromes section, so it's worth being familiar with your home base.
For example Bournemouth used to have something along the lines of a number of orbits at the class D zone boundary, then proceed to a base leg, a further orbit then land on the appropriate runway.
The best option by far is just to find an airfield that you know will accept non-radio traffic and do an overhead join, preferably one with a ground signal board to show runway in use and any gliding etc.