Identify any veto issues. General quality things about materials, construction, cost. Then pick one or two variables you care most about. Does the couch need to be comfortable, sturdy, aesthetic, etc? (1/2)

Then be ruthless. If it doesn't pass your vetos, move on. If it isn't excellent on your important variable, move on. If it's tempting but doesn't fit your rules, save it, move on. Come back later if you realize why your rules were wrong. Once you have more than two possibilities, just pick one.