Credit cards can easily entrap you with debts. A little discipline goes a long way in ensuring that you stay safe from over-charging your card. Use shuttle buses which are cheaper than cabs. Loose change can do to pay for the fare compared to cabs which charge premium rates that usually need to be paid using credit cards. You can also take advantage of club membership on offer at various airlines. This means you can use their changing and rest rooms at will for free and not have to pay for the same in restaurants. You can also get access to free internet, computers and telephone calls whose roaming costs would be too costly.