I am embarrassed to admit that we've lived in our home for over 7 years and I've never tried this super simple way to "improve" our nasty kitchen cabinets.
Contact paper! Ever used it? What a simple and inexpensive way to change the look of your old cabinets. Just like a fresh coat of paint, it can change the look completely!
I bought 4 rolls of contact paper. Those 4 rolls covered the cabinets in these pictures (with bottom and upper shelves), as well as an upper cabinet with 3 shelves and one small drawer.
There are many colors and patterns to choose from. I chose a simple light color that matched our kitchen flooring. Even though the inside of the cabinets is not something visitors to our home would ever see, I see them every day. So this home improvement was simply to freshen up my work-space not to impress anyone else!