@aredridel @Annalee I also run counter to the "sit and wait" advice by generally viewing the "feeding flock" (mixed small birds foraging together) as a mobile thing, and walking until I hear it. In wooded areas seek high ground - the birds don't like it any better, but you'll have a better view of whatever's there.
That said, if you're on something's foraging route you might have it pass through your space - I camped recently at a site where a black-throated green warbler and a scarlet tanager moved through in the same direction at identical times on two days running. There's definitely hot spots and movement corridors that are worth waiting at, but even at those, if it's quiet I move around and find a different micro-habitat.