Lines Betting

There are so much transaction methods nowadays that everyone should be able to find one that works for him. The most popular way to deposit/withdraw from online gambling sites are the credit/debit cards. Deposits are instant and withdrawals are made within 4-5 days. Every self respecting gambling site has this payment method. This is the easiest and preferred way for most of the players.
Bank Transfers are the 2nd popular transaction method. In this case you deposit and withdraw directly to your bank account.
Internet wallets are used by users that do not trust the gambling sites. In that case your money are kept in internet wallet and you deposit with that wallet, that means the gambling sites will never know your credit card details. The most famous internet wallets are moneybookers, neteller and click2pay.
Checks are very slow and I don't recommend to use them. Unless you don't mind waiting 2 weeks.
Whatever method you choose you must know that your money are safe if use the recommended sites here. Remember if you have problems depositing or withdrawing to contact the customer service of your gambling site by email. The people working there will help you in no time, every big gambling site has stuff working 24/7.