An alternative to making more money is spending less. Now I don't know your financial situation so you may already be cutting expenses to the bone. If not, look for what you can do without and get rid of it. Focus first on recurring monthly or weekly expenses since those have a way of adding up without you even knowing it. I've often heard from people short on money that they maybe get a cappucino each day and then say it's only $4. Well in a year their cappucino habit is costing them $1460. Find a few things like that and you don't need to make an extra $250 a month.
When I used to work at a regular job I took the subway to work. Unfortunately where I live the subway was about two and a half miles away so that meant another fare. The MTA has gotten rid of two-fare zones since introducing the Metrocard but at the time taking the bus both ways would have cost me $2.50 a day. Therefore I walked to/from the subway, over five miles a day total. The only times I didn't was when the weather was very rainy or snowy, or when I worked overtime. I also rarely bought lunch out, saving another $4 or so a day. Combined these two things saved me $6.50 a day, $32.50 a week, $1690 a year. Amazing how quick little things add up, isn't it? I'm not even counting the fact that I never bought breakfast or coffee, either. That was probably good for another $2 a day, at least.
Besides the recurring things, I never bought anything unless I absolutely needed it. Often if you postpone a spur of the moment impulse buy you will find that a week later you don't want the item any more, and you have one less piece of clutter in your life. The only time I buy something is if I keep thinking about it for months (been thinking about an HDTV for over two years now but have yet to buy) and I get a very good price on it. I refuse to pay retail for anything but would rather wait for sales/closeouts. I could go on, but I think you get the picture. I you can discipline yourself and not buy the latest and greatest when it first comes out you'll be a long way to achieving financial solvency. Without revealing my exact net worth, I actually have more savings than most people who make 5 times what I do. In fact, I'm well under the poverty line income-wise believe it or not. Yes, I live with my parents but I've known many people who do and still squander every cent they earn.