Depending on where you live, home security can be a serious concern. We live in a generally lovely, crime-free neighborhood, but still had a very expensive package stolen right off our porch. Unfortunately, these days, most of us can use a good security system.
The internet has provided a great way to compare prices and services side by side, with less sales pressure than some other methods. Check a variety of sources and dealers to get the best fit.
Similarly, if you're looking for a new satellite or cable television provided, make comparisons before you buy.