have found myself in the same boat a few times but as i only get out once every 5/6 weeks i have made the mistake of trying to fish a poor swim, i agree with the going home part and hindsight is wonderful but sometimes i do just want to sit there in the peace and quiet with no distractions. i have regretted fishing a blank in a bad swim as i agree with some of the other comments about feeling unprepared for the change in swim i had in my head and the planned approach.