Here is a checklist of things you should be completing over the next few weeks. For those of you in Colorado you may have been as surprised as I was by the snow we got last week, but it certainly got my husband and I moving on getting our list at least started.
Fall Maintenance Checklist
Cooling System - Shut down your evaporative (swamp) for the winter. Don't forget to seal off the vents going into your home, too! Here's an article on simple swamp cooler maintenance. http://homeinfosource.blogspot.com/2012/06/simple-maintenance-for-evaporative.html
Irrigation System - Shut down, drain and in some cases have your sprinkler system 'blown out'. Depending on where you are located and how your system was installed you may be able to simply shut down and drain your system. In other cases you may also need to have your system blown out with compressed air. If you aren't sure I suggest you air on the side of caution and have the system blown out. Shutting down and draining your system is well with in the average homeowner's skill level. If you're paying someone to do it this year, follow them around and take notes so you can do it yourself next year. Here's an article I wrote on how to start up your system, http://homeinfosource.blogspot.com/2010/03/how-to-start-up-your-sprinkler-system.html, if you do this in reverse you should be okay.
Protect exterior water pipes, faucets, etc - Remove all hoses connected to outside faucets (aka hose bibs) and cover any exposed water pipes or irrigation back flow devices.
Caulk your windows and doors to help protect against leaks and improve your home's energy efficiency. Here's an article on how to caulk. http://homeinfosource.blogspot.com/2010/11/how-to-caulk-tubs-showers-sinks-and.html
If you live in the Denver Metro Area check out my calendar of home improvement classes.