Despite the hours I will spend trying to remove any trace of glue from the surface of a finished piece, glue mixed with sawdust is a tremendous help. In the small Dixie cup pictured below is walnut sawdust from a first pass at sanding the dresser / buffet. When blended together with glue and inserted in small gaps in the furniture it is great at hiding flaws. It would have been better if I had done a little better at fitting the pieces in the first place, but this is a great plan B.