I'll tell you won't you shouldn't do.
Last night I logged onto an investing site and an anaylst was telling everyone to sell! NO NO NO! The concept is buy low sell high! For most individual investors if they now sell they willbe taking a loss. During a slow time (or yes, recession) we should move long term and pick up (in stages) stocks of well run/ strong/ companies that we like. In the long term these will be great picks. If you must do trade short term and you are positive we are in a recession you Short stocks to make money! On my accounts at investopedia and updown.com I have been shorting stocks like crazy and making money like crazy. (Can't do it in reall life due to lack of funds)
So for a recession two options I would do:
1) Buy quality companies in stages (i like ones with good dividends also) and hold them for long term.
2) Short the worst stocks to pick up some quick gains.