Congrats on the cards!
As far as keeping track of 'em all, here's what I do. (I posted this in another thread a while back).
I made up a chart on one sheet of paper several years ago. On one side of the sheet, I have all of my credit obligations listed, with each account's statement ending date and payment due date. I have the current outstanding balance listed under the account's name, and add any purchases to that total when I clean the receipts out of my wallet each night.
On the other side of the paper I have my bank accounts listed, along with their available balances. I add or subtract from these balances as deposits or debits are made.
When the statement date comes around for each account, I make the payment and check it off on the chart as paid for that month. I work my way down the list, and start all over again the next month.
How has this helped me to manage my credit, my time and my money? I've got a snapshot of my finances readily available to me any time I like, and it's up-to-date and easy to manage. When a credit card bill or other statement comes in the mail, I open it, check it for errors and then file it away...because it has already been paid, usually online, the day after the statement date (sometimes the day before). I know what I owe and what I've got for cash and when each payment is due, all in one place.
I avoid any technical glitches in getting the payments in on time by focusing on the statement date, rather than the due date. That way, if something screws up, I've got plenty of time to correct it.
I don't know if this would work for you or anyone else, but it works well for me and gives me piece-of-mind on a daily basis. And, I only check the accounts online when it's payment time (statement date). Saves me a lot of time and worry.
