A place for everything and everything in its place. Scrupulous hygiene for food prep. Wash up as soon as you've eaten. Have a grey-water bucket or container; only need to empty it once or twice a day that way. Try to get all your admin (cooking, eating, washing-up, squaring away camp) all done before dark: it's a lot easier than trying to do it with a head torch, perhaps tripping over tree roots, guy ropes etc. looking for the grey water disposal. Try to keep your vittles in critter-proof container(s), including your garbage; you don't get them there pesky rodents hanging about camp that way. Books to read - try a Kindle or equivalent. I sometimes trade my read paperbacks with other campers. A tarp over your living area is great, rain or shine. I second/third/whatever the suggestion for a chair. If I don't have a fire I tend to go to bed around sunset and get up around or just after sunrise - depending on the time of year of course. Sleeping bag liner (I like my Rab silk one). Proper pillows if you're car-camping. P bottle for the tent. If your missus is coming too there are things like the Shewee so she can share your P bottle (not that she'd probably want to!). A glass or two of a hop, grain or grape-flavoured beverage after supper makes the ground softer. After your trip make a list of what you took and didn't use and leave it behind next time.
You can have a reasonable wash with a sponge or two and some warm water: unless you're really yucky head, face, armpits, crotch and feet is all you need each day or so until the next hot shower. You may be able to blag a shower from a caravan site, or the local sports centre or swimming pool.
Libraries are good places to go on grotty days, especially if you can get WiFi for your laptop. Charge your mobile phone, Kindle, etc. while there. Can sometimes get WiFi/internet access from Visitor Centres.
I find that I want to simplify everything down, that is the gear, my routines, etc.: fast to make and break camp and get on the road or trail. I have - for car camping - a set of largish boxes that stack for organising stuff: e.g. breakfast box, lunch box, supper box, kitchen sink box (placcy bags, aluminium foil, detergent, J cloths, bog roll, paper towels, etc.).
Have a great trip!