sometimes I find myself tuning both the B and G just a touch flat. Someone told the human ear can detect slightly sharp but not slightly flat. Come in handy when one tens to go a little sharp when fretting a note.I tune to concert pitch using a tuner, then "sweeten" by ear. We didn't know nothin' 'bout this stuff back in the day but we learned to do it by playing along with records and always seeming to be a few cents off here and there. Luckily can do it by ear now, and only very occasionally do I use an alternate tuning (and when I do it's most often going to be drop d, so easy peasy).