Welcome to the forum! As noted there are a lot of storage options that you can use, what you pick depends a lot on the dimensions of the cabinet and what organizing system fits best. We have added shelves in the closets of every TT we have owned to help get stuff organized. Keep in mind that everything is moving while you are going down the road, so part of the challenge in organizing is keeping the stuff where you put it so it's not on the floor when you get to your destination.
Maybe start a new thread here in Travel Trailers and ask folks to post pics of some of the creative storage solutions that have come up with, both home made and store bought. Post some pics of whatever you decide to do too!