This depends mostly on where you are playing online casinos. For example, in the United Kingdom, credit cards can no longer be used as an online casino payment method. So, the best payments would either be through an eWallet or Bank Transfer. In Canada, Interac is a very popular and easy use banking method. The Wallet providers are much easier to use in Canada. In the USA there are no restrictions on payment methods as of yet, so Visa and Mastercard are very popular online casino payment methods. Each online casino will always provide a list of their accepted payment methods, what the minimum deposit and withdrawal amounts are, and if there are any fees associated with the particular payment method. All you need to do is check their site and use whichever payment method suits you best.