Hey bro,depends on the song,instrument,feel etc.On organ,rhodes,piano try to play chords that support lead lines-fill in the gaps,surrond the sound with some punctuation and not get in singers ways.If your backing horns,using horn patches try a split-bari sax for left hand and trumpets,sax/brass in right hand.That way the REAL horn stands out enough to '"sell the ensemble" effect.I came up in the "dark days of disco and blue note jazz(trumpet and alto)" so that's what I hear.Listen to Tower of power-your still a young man;great tune;also Chicago,Blood,sweat ,tears from about 1968-late 70's.If you have multiple keyboards ;mix up the patches so you have some keys,horns etc coming in and out.Last couple weeks using an XS 6 Motif for horns and organ on top with my trusty Korg M1 for piano,rhodes ,and some factory "stacks" be blessed