What's the typical lease missing that you've added to yours?

[John Ringgold]

What is one thing you've added to your lease that may not be in the standard lease that has prevented a problem you had from happening again?  

Not looking for the specific wording unless you'd like to share, but the "why"behind the addition would be a good start. :)

In the process of purchasing our first duplex and we have the BP Lease for our state downloaded and ready to go, but I am hoping to learn from the more experienced to hopefully protect myself from issues from the beginning. 

Not looking for "legal advice" and will run anything we like by a lawyer, but I was hoping for your input.