I've seen it mentioned on here that greasing your joints after being on the trail is good preventative maintenance, and I'd like to learn how to do this myself. Bear with me here, this may be a stupid question - but how do I do this? I mean, I know I need a grease gun, but what exactly should I grease and where would I find the fittings on my TJ? Any help/tips would be appreciated. Thanks in advance!