+1. Battery tech has come a long way from the days of NiCd. Batteries manage themselves just fine for most of us. They will naturally degrade, but the battery is smarter about maximizing the lifespan.Just plug it in. I always plug in my laptop when power is available since it gives me max performance. Even my 5 year cMBP system I only use every once in a while, says the battery condition is fine and battery seem to last as long as it every did.
A couple notes however, it's generally not recommended to ever run down Li batteries to zero. They are better with having some charge. I think the optimal is to always keep them above 50%. Also, for long term storage, charge to 50-70%, then store. Yes, I am saying batteries are best always between a certain charge level of 30-70%, but you won't get much more life trying to manually manage it. It's not worth the hassle. Just plug in and use.