Just curious what people have found to be the most effective way to use their sounders. I'm still learning with mine so don't know if I'm using it as effectively as I can.

My typical setup is dual frequency, gain turned up (how much?), with or without auto view turned on depending if I want to focus on the entire water column or just one segment. Am I missing anything? BTW I'm using a Garmin 240 blue.
James