Use the extra outlets on the pedestal for heavy duty extension cords and space heaters. Run the cords through the slides for dedicated power sources for your heaters (ceramic, oil filled, etc.). Most heaters recommend not using extension cords but a properly sized cord can be used. Check your owners manual.
For those that use ceramic heaters, make sure and vacuum out the elements for built up dust. The built up dust can be a fire hazard and can greatly reduce the life of your heaters. Even though most have built-in temp sensors, this is should be added to your routine maintenance. Don't wait until your heater is overheating to do the cleaning.