Ooh, what a fun topic! There is so much that I am glad that I did/learned before I was married and yet so much more that I could have done to prepare also! (Is anyone really ever ‘ready’?)
Learn to budget! While it doesn’t seem all that necessary while single, it is oh sooo needed in a marriage! I was budget-minded before I was married and aware of what I spent, but had never lived on my own and actually written out a budget until a few years after Matt and I were married! It has been such a good thing for us to work together on our budget. I can only imagine how wonderful it would be to come into marriage with some knowledge and practice already! Stay out of credit card debt and think about saving (what a great thing to come into a marriage with some money for an emergency fund, a wedding, car or house!)
Learn to process and share things with other people. Seems like basic communication, but it’s vital to a marriage! You can practice this in a small Bible study, with a mentor/discipler, with your mom or even just a close girlfriend.
Be prepared for the ‘everyday’ of life. Like the other gals have mentioned, cleaning, cooking, dishes, and laundry are all things that must be done! Practice them … even if it’s just in a dorm room :) You can always come practice at my house too ;) It’s fun to talk and work at the same time!