I'm with Slayer and Afrodactyl ... making it up as you go can be fun. Though I have at least largely learnt what will or won't go with something else by now (including the surprising "does" and "doesn't"s that can be handy when mixing stuff up), and a number of core recipes to use as mainstays or bases for experimentation.
This includes sandwiches
though that's probably cheating as there's not much to it.
(yesterday; wholemeal, mayo/english/wholegrain mustard, lettuce, grilled bacon and tomato, fried egg, crumbles of some fancy xmas cheddar that came covered in ginger & whiskey syrup... dear lord i'll have to do that again sometime)
Now and then I'll try to follow a book recipe or learn something, but it often ends up in improvisation because of what I have available (e.g. would you believe how hard it can be to find star anise in a city with one of the highest chinese immigrant populations in europe?), or finding two or three slightly conflicting versions of what would otherwise be a common / standard meal that I split the difference on then add my own touch. Mulled cider and cheesey meatballs have been recent reasonable-successes of this process, though I've made some changes to the scribbled "working" version of both based on how the tweaks went.
And when all else fails there's the odd cheap readymeal that lurks in the freezer for several months before being dragged out and nuked.
(the freezedried or canned ones usually end up getting melded with other things also, often with frozen _ingredients_; some odd packet of initially rather bland curry sauce powder "for fish" from the discount store turned into something wonderful with slight modification, frozen tilapia (also discount) and muchos fresh veg)
I can't even remember the last time I got myself a takeaway, and certainly not one that wasn't either a drive-thru burger/fried chicken or something questionable but filling to punctuate an evening of heavy drinking (and even then, we tend to get a real-ish pub meal early on instead). Mainly they enter my foodstream by being beholden to someone else "getting dinner" then going for the easy option - chinese if seeing my dad, pizza when at a friends' place, etc... Much though I recognise the syndrome that The Oatmeal presents, it's not usually that bad, and when it's a major project I quite like the Zen "flow" that you get into, and having some easily microwaved but homemade vittles for the coming days.
I'd recommend trying it, if you can spare the minutes. It's also a good way of making yourself healthier, because there's nothing like good veggies to bulk out and improve the flavour/texture/etc of a samey meal (again, inc sandwiches) even if you're remaining omnivorous. Split a 2-serving one into 3 for example. Getting the ingredients in means you'll likely have fresh leftovers, which you'll then have to use, and you get into the habit of it - there's no easier way to make yourself eat more produce and less junk than simply _buying_ more fresh and ridding the house of most junk. Plus the act of cooking forces you to wait a bit longer, which extends the "fuller longer" effect of that even further, and is almost like exercise. Almost.
(Wellllll mixing dough and/or meatball mix IS quite tiring if you've got a lot of it)
