I used to go into a spin as well when I first started. Here are a few tips my instructor gave me that helped me tremendously:
1) Heel checks: these help you bring your legs to level and easier to take it from there.
2) Practice leveling at home: when you're home, watching TV, playing video games or reading a book, arch on the floor and keep an eye out on your legs. You don't really have to arch too hard, just lay on the floor on your stomach holding the book or controller and lift your legs as if you are skydiving. If you have a mirror that allows you to see your legs at least it would be great, if not simply look back every couple of minutes and see how your legs are positioned. Fix them as needed, You can heel checks here as well.
3) Straight stand (just came up with the name): when you're not doing anything but standing (cooking in the kitchen for example, or standing at the DZ having a smoke, stand straight with your legs and feet touching each other. Looks funny I know, but it helps programing your brain to get used to the level or center point of where your legs should be in comparison to each other.
I did those 3 after my 3rd jump, came back for the 4th I think a week later and haven't span since.