Maybe change loan interest paid from non-deductible to deductible
Many people choose to purchase a reasonably new, if not a new, vehicle and, lacking the money to pay cash, borrow to cover part of the purchase.
Some such purchasers own their own business to conduct which they need the vehicle, which in many cases makes at least part of the interest cost deductible ... but for most of us, that opportunity is not available, so the interest that we pay on such a loan is not deductible.
On the other hand, many persons who choose to do some investing, save some money over a period of time, then buy some mutual funds, stocks or other investments, paying for them with cash.
If they choose to borrow funds in order to make such investments, in many cases the interest paid becomes deductible when one prepares one's income tax.
This is not true in Canada if one puts those investments into one's personal tax-deferred retirement fund, or the new Tax-Free Savings Account.
Please check with your local advisors who know the tax implications in your jurisdiction(s) before you take action, trusting that this info is true in your situation.
Good wishes for taking tax considerations into account when you consider the management of your income and assets.