The following is from the Austin Tenants' Council brochure covering Myths of Renting.
1. Before signing a lease always READ THE LEASE CAREFULLY and assume that you are liable for all terms of the lease unless you agree otherwise IN WRITING. Verbal agreements are usually not enforceable, and most leases say that verbal agreements will not change the written lease. Get all agreements in writing and have both parties sign it. Someone who won't sign a written agreement possibly has no intention of keeping it.
2. To clarify specific points and procedures that may be covered in the Texas Property Code, call the Austin Tenants' Council or seek legal advice before taking any action.