tuna IS a good source, just make sure you get the chunk light, not the white albacore, as albacore tends to have high levels of mercury.
better is shrimp, at 20g of protein per 100 g of low-cal, lean meat. not to be scoffed at are dairy, eggs, and traditional meats.
10 - 20 minutes of weights? sorry - not enough. you really need to spend time on a structured weight routine for maximum benefit, otherwise you're just not taxing the muscle enough to do anything. use the search function and look up one of cursor's weight routines.
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Goals: bench - 200; squat - 225; deadlift - 225
27/01/06: bench - 170; squat - 195 (wrapped); deadlift - 210; total - 575; need - 617; to go - 42
"Illegitimi non carborundum"
You should incorporate a variety of foods. Read this link. It has a shopping list in the links. Anything on that list is good to eat.
Getting toned is just building muscle. To build muscle one MUST tax the body more than you have described. You need a workout routine that keeps you in the gym 45min to 1 hr, 5 days a week.
hmmm with all due respect to Lady C (who knows a helluva lot more than me about everything) but I disagree that you need to be in the gym 5 days a week (though I do agree that 20 mins is probably never gonna constitue a good workout).
I personally am finding that 5 days a week is too much for my body and it 'burns out' (so to speak) after only a few solid weeks. I am (was?) however on a low/medium volume 7 sets to failure routine, pick a less demanding routine and I am sure there'd be no real problems (it's a semantic quibble more than anything, 5 days a week can work very well, but it is not a rule set in stone, less than 5 days can too).
Lots of people, including myself, consider it BAD to do weights every day. Your muscles need time to recover. Doing weights every other day and then running every other day (on the no-weights days) might be a good plan. If you do a search you'll find lots of good posts.