One of my favorite methods, and likely my most successful, is to show up at a berry bowl around 11:AM. Find a nice vantage point, throw out a small pad and take a nap. It is my belief that your mind listens while you sleep. Because when I wake up and there is a bear in the bowl it seems to be the very first thing I look at when I wake up.
Your scent pool is smaller, your quieter (unless you snore), and you aren't moving around. Complete peace in the surroundings seems a real benefit when dealing with med to late fall bear. When calves and fawns are dropping that can be different, but once the berries become the main food source absolute serenity becomes high on the priority list. And no better way I know than to get there early and sleep.