And many lenders won’t give credit to people with a history of recently missed payments on other credit accounts (with "recently" translating to two years back). Missing enough payments that your account is turned over to a collection agency is another sure way to tank your score, not to mention limiting your access to affordable credit – or make it cost more than it should.
Basically, the trick is to aggressively dispute negative records, especially older ones, and force the source of that information (otherwise known as “data furnishers”) to produce verifying documentation. A lot of times, the so-called data furnishers can’t, which obligates them to stop reporting the negative item to the credit bureaus and thus removed from the consumer’s file.
Next, estimate your monthly spending habits for other expenses such as gas, groceries and entertainment. Create a limit, based on your income, of what you can spend in each of the different categories of expenses. For example, if you tend to spend $400 a month on groceries, try to stick to $300 a month on groceries by making changes like buying generic brands, using coupons, and resisting impulse purchases.