One tip: Have your finishing area well lit and be looking for
problems as you're applying the finish. You can basically wet sand
those glue spots right as you're finishing and they disappear right
before your eyes. Then give it a critical look over before the second
coat.

Please excuse my ignorance, but what do you mean by "wet sand those glue
spots right as you're finishing"?
Does the glue spot show up when you're applying the finish, and you sand it
while the finish is still wet?

- Owen -