Flip,
Here are a few suggestions off the top of my grey head. First, on the financial side, see if your company will pay tuition. If not, you may want to prepare your resume and find a company that does. Second, be real good at time management. Have your books with you at all times, so you can study at your lunch break and coffee breaks, standing in line at the grocery store, etc. Another time management trick is to tape lectures or your summary of the lectures and play them while driving. Third, expect to sacrifice some of your social activities and your hobbies. Something's gotta give. Fourth, study every day. Don't try staying up all night studying for an exam, the night before. Fifth, think about the lecture you just heard as you are leaving and going to the car to go home. When you get home tell someone else what you just learned. Talking about stuff, is one of the best ways to tranfer it from short term to long term memory. Sixth, read the assigned material before the lecture. It will help the lecture stick in your mind. Seventh, see if you can get involved with a study group on campus, so you can quiz each other before a test, and you can help each other with homework assignments. Eight, if you are taking evening classes, take two, not one and schedule them on the same evening, say Monday and Wednesday - why? It is too easy to blow off a class, but if you blow off two of them you know you will be in trouble, so you are less likely to do so? Why on the same night? Because it gives you a day in between to study for a test. Nineth, go to school all year long including the summer. If you take a break, you will loose your momentum.
Yep, I've been there, done that.
I hope my ideas were of help to you.