Lying down on a sofa .. Firstly reading, doing a simple task, or watching TV / surfing on net / listening music ..At the end taking a "break" as a popular "siesta" or directly sleeping on the sofa.
(To practice or to do.. is implicit in the meaning, but you are free to include them when you are writting/saying the word)
Other similar meanings:
Rest few minutes lying down on a sofa.
"Unplugging" for all the tasks of the day for few minutes, lying down on a sofa.
I need sofing, this day is so complicated than I need to disconnect.
I like sofing after a long day at the university, before cooking the dinner