After previously using cassette and then briefly minidisk media for off-air recording, I now use PC. As this isn't exactly a portable solution I have now invested in a Roland R-05 wave/mp3 recorder which can be used together with my Tecsun PL-880 and Kaito KA-1103 receivers. Unfortunately the other Tecsuns don't have a line output socket so I'll need to record via the headphone jack..
Shortwave listening and technology musings mainly using a selection of portable radios from the trailing edge of technology. You may find the odd SDR starts to creep in too.