If you are eligible for funding via Student Finance make sure you re-apply as soon as you can, if you haven't already. You have to do this every year.
Make sure you:
Have some moeny to last you at least 2 weeks after the start of your course. Even if you completely sorted out your funding the University may not confirm your enrolment until the official start of the next year of your course which means that, although there may be a date on your entitlement letter for the first payment, you may not receive it on that date.
Once we confirm to Student Finance that you are in attendance it takes them 72 hours to get it into your account.
For more tips on how to get the most out of your money see: Funding and Budgeting