These days the best course of action is to admit to yourself that you're lost, then get on the radio and ask for help.
Which is no doubt why the club's FOB includes (amongst other stuff)
If radio serviceable, call nearest suitable airfield with radar/VDF to obtain fix/QDM
...
If, after carrying out the procedure above with no success ...
Make a PAN call on emergency frequency 121.5 stating predicament
Personally if I lose the picture - and I can't be that lost, I knew where I was two minutes ago for heaven's sake! - I look around for a bit first before calling for help.