Flooring: Upgrade from carpet & lino to Hardwood.
Kitchens: Open concepts & modern colors are key. Refinish existing cabinets & replace countertops.
Bathrooms: Same as the kitchen. Modern looking tile & a pedestal sink frees up room and makes a big difference.
Paint: Inside & out; go for neutral colors.
Floor Plan Alteration: Open concept. A large master bedroom and a spare may work better than 3 small bedrooms.
Professional Basement Development: Leave it to the pros!