Stepping away for a while can definitely work. Over 25 years of gaming and I did that a few times. Just in retrospect I wondered what I missed out on, and in many cases knew what I missed out on, and it was all a lot of fun. Which is why I then started just doing drastic genre switches, so if I burnt out on Fantasy I went Sci Fi, or at least quasi sci fi. Which is how I found out I really like RIFTS, Synnibar, Aftermath, Shadowrun, Traveller, and eventually Legend of the 5 Rings, Pendragon, Chivalry and Sorcery, etc... Plus other people usually ran these games and they were the one looking for players. So I even got to play rather than GM!
Eventually I would know when it was time for me to return to my D&D fix.
Still, about a year ago in particular I knew I was reaching burn out on my D&D/C&C games. I was playing or running several a week. I did notice that I perked up after my Thursday game, which is the night my group is dedicated to trying out other games on a 6 week rotating basis. So I started thinking and wondered if I shifted the balance of my games from being C&C to other RPG's if I would get reinvigorated that way.
So I patiently waited. Eventually my Friday C&C game became CORTEX, and starting this week, Eclipse Phase. My home face to face game picked up people outside of my family and we started playing Aces and Eights with me as GM, and now we will be alternating it with L5R 4E, ran by my daughter. Plus the Thursday game kept alternating between Silhouette, Dragon Age, currently EPICrpg, and so on.
So now my "burn out" is gone, and I didn't have to walk away from any game for a long period of time to recover, I just needed to stimulate my brain with a variety of genre, and it has been working for me this time around.
Unfortunately for most of you gaming so much is not possible for you. If it is, give changing things up a try. It can work.