One thing that I have noticed is the older I get, the more I enjoy the wins and the less that I wallow in the losses. A loss used to ruin the entire season for me, then it would ruin my week, then my weekend. Now, I can typically move on in a matter of a few hours. (It might take a little longer when it's a loss like last year against MSU. I still can't believe the play calling in that one!)
Some might think this makes me less of a fan, but I just try to maximize the joy that I get out of following the team instead of stressing myself out and being angry while I'm watching a close game that should be a comfortable lead. I enjoy teaching my 5 year old son about the game as he watches with me instead of cursing at the television. I enjoy texting friends about an amazing play instead of worrying about the easy dropped pass from the last series. I guess at this point in my life I have enough sources of stress that I don't want to make watching a sport that I love one of them.
If you can do it, my advice is to watch with zero expectations. Taking that approach has worked well for me and made watching football much more enjoyable than it ever used to be. Of course a 50-4 record since UFM took over doesn't hurt much either.