Carry On Suitcase Suitcase+Carry On Bag Only. What Neat Gadgets, Skate Things, And Other Things Can I Pack?

Suitcase+Carry on bag only. What neat gadgets, skate things, and other things can I pack? - carry on suitcase

I live in a suitcase and carry stock size for one or two years. What should I pack would make life easier. I am also very little money so not Uber expensive items.