The more expensive suggestions (new side door, new double paned windows in the basement, new and additional insulation throughout the house) may have to wait for funding, but the free and inexpensive solutions should still make a considerable dent in our energy bills.
Fortunately, our energy advisor had solutions for us, and some of them were even free. He offered a programmable thermostat (we already had one), installed a low flow shower head and multiple CFLs and one LED bulb. Other solutions were fairly inexpensive:  Anthony recommended screw-mounting plywood over the crawl space opening, installing a small door over the former coal chute area under our front porch, and insulating the duct work that travels through our crawl space.  The more expensive suggestions (new side door, new double paned windows in the basement, new and additional insulation throughout the house) may have to wait for funding, but the free and inexpensive solutions should still make a considerable dent in our energy bills.  At the conclusion of the 3.5 hour energy audit, Anthony left a full color printed report that contained discount offers on recommended energy related products and services through pre-screened local companies.  It was an afternoon well-spent!