If you have framed pictures, there's usually enough of a lip on the backside of them to stash quite a bit of weed. Or tack a baggy to the wall behind a poster, nobody searches or steals posters.

My wifes strategy is pile up so much pretty stuff everywhere that upon entering the room a person immediately forgets what the hell they where looking for. My weed usually hides in plain sight amongst all the baubles, remotes, and junk mail on the coffee table.

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a clean bong is a sign of a sound mind