Just a suggestion here Chuck. Instead of praying for more money, or for some miracle to get you out of your financial binds, pray for God to help you with the wisdom and strength to do what you know is right (financially).
You have already been blessed by God with a few things here. You have been blessed with the knowledge of how to manage money better. You have even been blessed with money, since you admit that it's not money that's the problem, but your management of it.
This accomplishes two things. First, it helps you acknowledge the blessings God has already given you... which allows you to humble yourself and thank Him for those blessings.
Secondly, we often avoid praying for things because we feel like we're greedy if we ask for things like money. However, praying for strength and wisdom over a character weakness isn't greedy at all.
Remember that God will never tell you not to pray, even about things you may feel quilty praying about. God already knows your needs and the desires of your heart. He already knows the financial circumstances of your family. Prayer isn't about reporting to God to keep him informed. Prayer is a show of faith in Him on our part.
The ony thing I'd add here is, remember the line, "be careful what you pray for, you might get it". God could (and might) put more money in your life if you pray for it. However, if that "blessing" doesn't come with the wisdom and strength to manage the money, then the "blessing" might be given in the way of teaching you why you shouldn't have more money.. yet.
God helping you overcome your character flaws may not put more money in your pocket, however, when you have the strength and wisdom to manage your money, you'll be shocked at how well you cover your financial obligations.. with or without an increase in income.
Of course, then you'll have to make sure you thank God for the blessings and not do what most people do when they are no longer in trouble... that is, figure you took care of it yourself and don't need to pray anymore. ;~D