If your couch is dusty and company is coming, grab a dryer sheet and give it a good rub down. It picks up the dirt and leaves a lovely fragrance that doesn't smell like you just emptied out a can of air freshener. Also helpful on your coat if you spent the evening around smokers.
Just before your about to throw out dying flowers....
Pick the leaves and place them ontop of radiators around the house!
The flowers still have fragrance in them and it save you having to buy air freshners!