Nostalgia has a warming effect on both our bad moods and our bodies. Recalling a past event or listening to music that triggers nostalgia makes us less aware of cold temperatures, so make sure to crank those childhood Christmas tunes up extra high this year.If you ever find yourself in a rough patch with your significant other, try thinking back on some of the fonder times in your relationship. Remembering these good moments reminds you of why you're together in the first place, and it only serves to strengthen your bond.