I have learnt that to enjoy camping you need to take less. I know it sounds crazy coming from me with my kitchen setup but i got tired of all the plastic boxes, having to sort through them, make them fit in the car/trailor etc. The kitchen is one thing that sits there in the trailor or at the campsite and i don't have go through boxes to find what i need, i think of it as one big organised box. The tarp is a bit of gear but once it's up you're glad you bought it along. I used to take gadgets and nick knacks in case i got bored but i never needed them, a book is all i need these days but still take my radio scanner sometimes and my kite at the beach. We now take the DVD player for bubby for her playschool dvd's.
Preparation is important. I used to write everything down but i always forgot something. Sometimes i still wrtie stuff down if i remember it at work or worried about forgeting it or whatever before a trip but generally i try to visualize the last campsite. I sit out the back with my gear as i pack it and imagine i'm walking around the campsite looking at stuff i use or need. I walk around the campsite in circles thinking "yes i've got that, yes i've got that, no i'll go get that right now". I find this works well for me because i remember what all my gear looked like in the last campsite. Now i have a trailor everything pretty much stays there anyway, except for clothes and pillows and stuff