How do I close empty credit card accounts?

I have recently checked my credit report and I realized I had several credit card accounts which were unused for several years running with a zero balance for some time.
I would like to close them to resolve my accounts and improve my overall credit.
I have to admit that some of the credit companies [...]

What is the best way to pay off my credit card now that I have money coming in?

Now that I have money coming in steadily, what is the best way to pay off my credit card? Should I make a payment weekly as I get the funds, or should I pay a certain amount more each month when the bill is due?
I have not missed any payments yet. [...]

Can you transfer a card with no balance, to a card, say which earns airline miles and does it hurt your credit

I have two cards with zero balance and wanted to transfer one of the to an airline card to earn the miles. Can you transfer cards with zero balances and does it affect your credit?