As most of you know, to be truly successful in BJJ/grappling you need to put in the work and the mat time. It also helps to work on your strength and conditioning. Now we all have our own ways of training, some swear by kettlebells, others believe in high intensity training. I personally prefer a variety of exercises, usually I start off with this and then I move onto working on my guard with this, and finish off like this. Take a look at Pedro Sauer's north south escape which will undoubtedly make you skinny.