This is the time of year when I seldom ride for fun. I commute occasionally, as weather and errands allow (I oftentimes have to run errands that require the use of a four-wheeled vehicle). I also try to ride each bike at least once a week just to keep it running. I don't like to let my vehicles sit.
One tip I've read is to either park your bike with a nearly empty tank and fuel stabilizer added, or better yet, park it with a full tank of fuel. When bikes sit for long periods, water condensation can form on the inside of the tank. If the tank is full, there is very little exposed surface area inside where condensation can form. That is why I choose to keep my tanks full when they are parked.
I'm not a mechanical expert by any means, so if any of my knowledgeable readers want to pipe in and comment on the validity of this approach, I'd appreciate it.