I know a lot of my friends work in a cold, drafty office and they are always "freezing" at work. I have a very simple and heartwarming idea. I keep a heating pad at work and it works wonders for any aches, pains, or simply cold/chilly feet. It's easily out of view plugged in under my desk or sometimes draped over the back of my office chair with a sweater over it.
Those small office heaters are typically not very economical or welcomed by management due to the risk of fires. Some offices are not allowed to even have the heaters due to fire regulations enforced by fire marshals. The heating pad can be unplugged easily and stored out of sight. On a chilly day, the heating pad over your feet can warm you up all over and put a smile on your face.
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Use a heating pad on "low" to warm your baby's crib before lying him/her down after you get him or her to sleep. But remember, be sure to check the temp with your hand before to make sure it's not too hot.
Two years ago I received one of those small electric heading pads from a friend for the holidays. Within a month or so of owning the pad, I found myself using it for a few things and to this day it's one of the most useful gifts I've ever received.