The corner unit of a L-shaped kitchen or U-shaped kitchen needs to be paid proper attention.
1) Cut out shelvesThis is the most cost-effective solution as no additional accessories are installed. However, it is not the best option as it is difficult to reach to the corners.
2) Extended shelvesThis design is useful if you plan to store some less used items in the corners. Even though it is difficult to reach out this is a cost effective solution and may work for many households.
3) Corner Carousel UnitAccessories like Corner Carousel made by brands like Ebco can be used. These accessories rotate and make the utilization of the space easier. This is a good accessory in budget.
4) Corner Swivel PulloutCorner Swivel Pullout made by Hettich is one of the best option which provides the proper utilisation.
5) Magic Corner UnitAnother accessory from Hettich with great utilisation of corner unit space. The accessory on pulling comes out of the cabinet completely in a smooth action.
Hope the above points gave you some insight into kitchen planning. A good kitchen does take some time to plan but as you are going to use it for many years to come its very important to pay proper attention before finalizing the design.
If you have any questions, do post them in a comment below and I will be glad to help answer them.