Let's take a few moments to see what's under the sink in the kitchen.
If you have a carrier which holds your cleaning supplies, clean that out. Get rid of old sponges and outdated cleaning supplies. Wash it out. Check to see if you have everything you need for cleaning throughout the house. If not, add what you need or put it on your shopping list.
Now for the entire cabinet. Start in one corner and work systematically from there. Toss anything that is outdated, empty, or not used in the last year. Remove or combine duplicates.
Sort into like items: dishwashing (liquid soap, dishwasher soap, brillo pads; etc.); general cleaning; and other categories you keep under the sink.
As you are sorting, ask yourself, "Is this the best place for this item?" Maybe your general cleaning supplies would be better under a bathroom sink, in the laundry area, or in another place.
Place items back under the sink in their like-item groups, placing those things you use most often closer to the front.
My own personal bias: get rid of the dish drainer. It's unsightly and makes your kitchen look messy. Or get a wooden fold-up dish rack that takes up only about three inches of space. When you finish a meal, place your wooden rack on a kitchen towel. Wash the dishes and put them away and fold up your dish rack. Store it on one side under your sink. If you only wash an item or two, drain it on a towel and dry immediately. Clean surfaces!!! How refreshing!
If you have little ones, make sure you have a safety lock or a keyed lock on the cabinet door where you store your harmful chemicals.
Thanks for visiting my blog. Hope you find some helpful hints for organizing your time and space. My passions are to help you make home a refuge instead of a crisis center, and to help you function in peace rather than chaos - at home or at work. I have switched my main blog to 1-2-3 ... Get Organized on WordPress, so please visit me there.