To use leverage effectively in commercial real estate investing, you need to consider several factors, such as your investment objectives and risk tolerance, the property type and location, the financing terms and options, the market conditions and trends, and the exit strategy and contingency plan. It's important to have a clear idea of why you are using leverage, what returns you expect, and how much risk you can afford to take. You should choose a property that matches your investment criteria, has strong fundamentals, and is located in a stable or growing market. Additionally, you should compare different lenders, interest rates, loan types, amortization periods, and repayment options. Additionally, it's important to monitor the supply and demand, vacancy and occupancy rates, rental and sales prices, and economic and demographic factors that affect the performance and value of your property. Lastly, you should have a clear plan of when and how you will sell or refinance your property, as well as what alternatives you have in case of unexpected events or challenges.