Which Maintenance and Repairs Should a Tenant be Responsible For?

[Thomas O'Donnell]

How do you determine who is responsible for repairs/maintenance? 

Obviously if the furnace or AC goes out, or you have leaks coming from the roof or upstairs bathroom, it seems that it would be the landlord's responsibility to address and fix these issues. But what kinds of other issues could be caused by the tenant, that they should be responsible for paying for? And how would you structure this in the lease so there is a rule that states that a tenant must pay for certain repairs if things are their fault? We all know there can be damage, leaks, etc. that are due to the neglect or actions of the tenant. How can we protect ourselves as landlords and make sure we aren't the ones eating the costs?