Go to Sears and buy one of their canvas tool bags that zip closed. Canvas is better than plastic or metal because it will not rattle when you drive down the road. Then you can start filling it with things like duct tape, screw drivers, a hammer, basic wrenches, etc. And you can never have enough flashlights!!
I also recommend buying a ton of clear plastic bins to put things in so they don't roll around your cabinets. The thing about RVs is stuff moves if you don't contain it in some way. All of my stuff in cabinets and cupboards and even in my storage "basements" is stored in various size plastic bins. They prevent stuff from shifting as you drive and getting wet if the seals on your basement doors don't work well, as mine don't. Clear plastic is best because you can see what is inside. I have ones with lids and ones I can easily reach into, depending on what I need to store.
I like these in various sizes for upper cabinets where I put maps and assorted stuff I need for walking, like bug spray, maps, CDs, DVD, and all sorts of small stuff.
http://www.amazon.com/IRIS-Plastic-Stacking-Bin-Medium/dp/B0002LCZUU/ref=sr_1_9?s=storageorganization&ie=UTF8&qid=1439779476&sr=1-9&keywords=plastic+stacking+storage+bins
You also might want to get a couple of tension curtain rods to use in your refrigerator to keep things from falling out whenever you open the door.
It will take you a few trips to decide where you want to put things so you can find them again, but I like bins because I can put supposedly like objects together.
In any case, have fun!