A lot of these casinos offer online services such as FirePay, Netteller, and others which allow you to link your bank account and deposit electronically.
Depending on where you live you also have the ability to use your credit card provided by your bank and make deposits this way.
If you live in the United States you may run into some issues where you are unable to sign up for these online payment services.
There are laws passed by the United States government that will not allow you to make deposits to casinos from your credit card if you live in the United States.
Many people have found this to not be fair because they feel that they should be able to spend their money on whatever they want, and this includes gambling online.
There has been discussions on various websites on how United States players can gamble online if they are not allowed to use their bank cards or sign up for the online payment websites.
Many of these websites have found that you can use prepaid gift cards to get around the United States gambling ban.
This is an alternative that is available to someone who lives in the United States and wishes to play at a internet casino.
If you live in a country other then the United States then you are in luck, you can deposit your money quickly and easily.
However if you don't have that luxury you should look into the prepaid gift card method to find out how to make deposits to casinos.