Am I missing anything...?
the budget/plan
well you were, as you have started to get on top of that now.
Start with the SOA and put everything for a year on it.
http://www.stoozing.com/calculator/soa.php
if you need help looking for ideas post it here.
(calculate then format for MSE)
spending diary will check that you have not missed anything and check the numbers are right, add the missing things and adjust if over under on any category.
You will be spending too much and not saving for the bill that are coming up.
the trick is to workout how much you need to be holding back for the bills and where you can cut back, and to do that you need to know where the money is going.
Living in the credit is one big bill away from that increasing, until the next big bill.
what if you lost an income?
The SOA exercise will give you an idea of where you could cut back if needed.
A good first step would be to get from next month money is paying for this month to net this months money pays for this month.
The next step is this months money pays for next month.
If you want to use the CC to do the planning then a 0% purchase one is probably better than a balance transfer one.
the important thing is not the balance and cash but what comes in and what goes out, you need to know where the money goes.
if you have £1200 on the CC and want to clear that in a year you need to spend £1200 less than you earn over the year.
Make the plan and track the spending to the plan.