As kitedemon said the room temp is usually the biggest factor in good regulation. Flexwatt can only take you so far. Bumping the room temp 1 or 2 degrees higher can make a big difference. Keeping a setup away from a cold outside wall or away from a house vent or drafty door are other simple fixes that can work. I've also seen lamps pointed at the enclosures used on appliance timers to bump day temps up.

-Dion