Have your magazine subscriptions, bank statements, CD club deliveries, and so forth forwarded to Baker. Find out if your current bank has a branch near Rice. The O-Week book lists some nearby banks. If not, you may want to consider opening a new account in Houston once you get here. Again, the O-Week book has more information.
Some banks also have special reduced-fee accounts for students.
If your current bank will work, think about getting some checks printed with Baker's address. You can usually have them printed without a phone number. Many banks automatically mail them to the address on the check, so when you get here, they'll be waiting. Remember, don't have anything mailed to Baker before August 20. Call your new roommate to make sure that you won't end up with two of the big things.