Apps on your phone are probably the easiest way to earn money quickly without matched betting. Ones to look out for are Roamler, Task 360 (ios only), streetspotr, clicandwalk, mobeye, qmee, curious cat, streetbees, vypr, voxpoxme, jobspotter and slicethepie. Also receipt hog and shoppix will pay for pictures of your receipts. Traditional mystery shopping is also a good one too. Getting paid to eat out!
Matched betting definitely pays best so it might be worth trying to put aside a little bit of anything you do make until then and then make a go of it. I started out with £50 and within 2 weeks I've made well over £150 profit. Like you I didnt have any money spare so I saved all my paypal payments up. Can totally see me hitting £1000 a month on this alone by the middle of the year!
Lionbridge are also recruiting at the moment. Similar to leapforce but got back to me within days. Still havent heard from leapforce and I applied in November! And look into usertesting and whatusersdo. They pay you to look for bugs in websites.
Take matched betting out and you should be able to bring in at least £500 a month, probably over £1000 with lionbridge/leapforce.