Have your tank inspected by a septic tank professional every three to five years - more frequently if your family uses a lot of water and/or a garbage disposer. You can reduce the strain on your septic system by using less water and staggering showers, clothes washing, bathing and other heavy usage.
When laminating, use 1″ vinyl blind slats between your surfaces to align the edges.
You know that old freezer "Uncle Harry" gave you to use in the basement so you could save money by storing on-sale food items? Well, it costs more to run that freezer for a year than you'll ever see in returns on food savings. If you're looking to save energy, and money, it makes more sense to have only one, well running, efficient refrigerator/freezer.
When purchasing lumber, know the various grades. Often perceived savings can be the result of a lower grade wood.