Find boring scenes that may not belong in the story by listing the beats (scenes, maybe in some cases chapters) of the story, and if you can put a “but” or a “therefore” between two of these beats, you’re good to go.

If on the other hand you have to put an “and then” between them, you’re in trouble and likely creating a story that isn’t entirely glued together and as cohesive as it could/should be.