I hope you mean you don't have enough cabinet space. As a kitchen designer I would have some questions for you before I made serious recommendations. But, here are some things you can do for yourself. Measure the openings of the cabinets in which you want to maximize storage. You will then be prepared for the questions that will be asked when you go to the store. Many home improvement stores and bed and bath stores have cabinet storage options...some of which are inexpensive and some are a little bit more. Decide what you need each cabinet to hold, use the measurements you took to decide which items they carry will work for you.
If you don't find what you are looking for in a store you can try a company like www.specialtysupplies.com or rev-a-shelf.com both of which carry a large array of items.