Like with all long term investments, budgeting is the most important part. Ensure that you know your affordability, and be sure to plan for unexpected events. Always factor in savings when making your bond calculations.
It’s best practice to take a bond that is less than the maximum you can afford, and pay that additional surplus funds into the bond every month. This will reduce your total interest gained dramatically. If trouble comes, you can simply and temporarily redirect that surplus to your emergency.