Have you read the pasta sauce thread? I am big proponent of making food in quantity and jarring it for later, which can give you affordable, delicious pasta, chili, soup, or even stir-fry in about no time. That's only really an option if you feel like spending a day at home cooking, though.
To just get more meals regularly, I recommend you go and buy yourself a nice chef's knife, and a nice big frying pan/wok. Go out and look at what you can buy, and take some time in the decision, and really get the things that you want, so they feel like they're yours. This should make you want to cook a bit more.
Once you've got a nice knife and a pan, it's stir-fry time! With a little practice, you can have yourself a stir-fry in about twenty minutes, no sweat. You'll need to get good with the knife, but that just needs a little bit of practice. Basic steps are (assume no waiting between steps):
-Put some rice on to boil, heat some oil in your pan, begin to thaw meat (unless you were clever and left your meat in the fridge to thaw overnight)
-Mince garlic/ginger, add to heated pan
-Chop onions, add to pan
-Peel and/or chop hard veggies (broccoli, carrots) and add to pan
-Cut meat (thin strips for beef, small-ish cubes for chicken), add to pan
-Cut soft veggies (peppers), wait till meat looks cooked outside, then and add soft veg to pan
-Fry for a few more minutes, until the meat is not going to kill you (feel free to dissect the thickest piece of meat to see if it's done through)
-Serve with rice when the rice is done
This is a fairly simple routine that can make great stir-fry while watching a half-hour TV show peripherally. Implicit steps left out of the play-by-play are:
-Stir the stir-fry regularly (duh!)
-Make sure the rice doesn't burn/stick on
-Sauce it! Add soy pretty much whenever you feel like it (I usually wait till the meat is in), and add some of that bottled stuff at the end. I highly recommend you buy a sauce/sauce mix when starting. Feel free to throw pretty much any spice in there if you feel like it, though.
Once you've got that down-pat, try marinating! There's already a thread on this, though, so I'll leave that for that thread.
Stir fry is pretty much the ultimate student (or student lifestyle) food, since it's a fairly simple and adaptable interface for supper. Throw whatever the hell you want into a wok and fry and stir.