5/10/17 Cover Sheet, Table of Contents, and Index of Defined Terms
Once a contract is more than 20 or so pages long, I usually provide a table of contents that lists page numbers for articles and sections. Word-processing software makes it simple to create a table of contents and keep it up to date.
The table of contents is placed before the contract proper. Because no one wants the table of contents to be the face that a contract shows to the world, it is invariably preceded by a cover sheet that includes what is basically a more concise version of the introductory clause.
If I use an index of defined terms, I place it immediately after the table of contents.