Keep It Simple Stupid (KISS) principles are often long forgotten when people are packing up vehicles for a camping trip. I know I'm often guilty of this myself. You want to take every piece of camping gear you ever purchased with you up until it's time to pack your vehicle. You realize you don't have as much space as you imagined in your head. Often times we want to pack everything including the kitchen sink. We're all afraid of leaving that critical piece of gear behind because there's no worst feeling than realizing all your cooking pans are in your garage when you're 500 miles away from home.
Keeping everything clean and organized is also a great goal to achieve. Having all your gear in containers or boxes that are well labeled and ready to go also makes spontaneous trips a real possibility. You're more likely to take a random weekend trip if all you need to do is load a few containers then grab beer, water, and ice on your way out of town.
The following checklist/ organization works for us. It's not perfect but it's centered around the type of camping we most often do. Depending on the type of location and activities we target we will often add or remove gear as needed. I've categorized all my camping gear into the following three containers--