I have been using FH for several years and have always had them switched on. I quite often see one that might be useful to me,though not on that occasion. By the time I need it I have probably forgotten that it was even there, until such time as it comes round again.
Of course I could write down each one as it appears, and perhaps that would help to get them into my brain, but I would prefer a lazy option if there is one.
Thanks in anticipation,