Casting into the air so to speak - to bring money into your life - always feel a bit woolly in my experience. It is hard to direct intent with precision if the spell is something along the lines of: "I'd like some more money please!"
To successfully draw money toward you, the first step is to think rationally about the likely ways this money will come about. Casting to increase your chances of gaining a better job or promotion at work is something you can work toward both magically and with mundane skills to bring it about. You can also bring the understanding of how the money will come into your life into the spell and this will help you to direct your intention with more clarity. If employment isn't relevant to your situation you could cast in relation to tax being credited back or influencing people who owe you money to pay it back. Providing you have a firm grasp of the practicality behind the spell this type of magic has a good chance of success.
Money of course works two ways - you can influence it toward you and you can prevent yourself from losing it. You could look at utilising your utility and household bills to prevent increases in your monthly outgoings with the emphasis being retaining the money you do have (try binding your bills to prevent them from growing). You could also look at casting to reduce the temptation of spending the money you do have, altering your own perception as to what your money should be invested in. Again this type of magic will be more successful than classic "come to me money" spells.
If you are keen on getting into the basic attraction magics then green is often associated with being the colour of wealth. You could do something as simple as lighting a green candle and expressing your desire for improved finance into the flame. I think this is a touch vague though. I prefer attraction magic to be more firmly anchored in a chosen direction. Working with magnets - one representing yourself and one representing wealth and gently drawing the magnets toward each other in the smoke of a green candle may add more direction to your spell. Better still if you employ this idea in line with the suggestion of using a tangible source of expected wealth.
Money and luck tend to go hand in hand within magic so doing spells to improve your luck may well have an effect on your prosperity. Luck magic is an area where I do personally like to use common correspondences and I have to say the old orange and basil oil combination works for me every time. Try anointing your bank statements with a mixture of the orange and basil oil and then tying them firmly in a bundle with a green ribbon while visualising the statements looking healthier and reflecting better financial circumstances.