Variable interest can be a dangerous thing. If you have a credit card that starts with a 0% interest rate and then creeps up on you, or if you have a 5 year ARM mortgage or home equity loan, it is critical to watch your rates closely. Look for fixed rate debt loans at reasonable interest rates because the stability of these payments will help you effectively get control of your debt. Keeping track of multiple variable interest rate loans can easily get overwhelming. When it comes to debt loans, remember the KIS principle - Keep it Simple!