Q: How do I get paid when I freelance in writing?
A: PayPal is the preferable way to get paid. However, if you use paid freelancing sites, you will receive payment through Escrow and then you can withdraw to your PayPal account or any other accounts depending on the sites.
I recommend PayPal because it is easier to bill your client. There is an invoice service and you can use this to send invoices to your clients and have them pay you through PayPal.
However, it also depends on your geographical area, whether PayPal is available. If it is not available, you will have to find other ways to receive money internationally. After all, you might be in India and your client is in USA.