What do you have?
To start, you have to take survey of the tools you have. Make a list and take note of tools that are rusty, broken, and in usable condition. Keep the tools you need and place the others aside. That way, your immediate toolbox will be less cluttered and contain the items you need most often. For example, a hammer, screwdriver, drill, tape measure, utility knife, and flashlight are toolbox staple. Add other items that relate to common needs such as gardening or electrical work.