(1) Get details of bank account into which your escrowed money will be placed. Don't back down on this.
(2) Your escrowed money is for certain purposes ONLY. Contact a realtor or attorney to find out those purposes. Know the law and your rights BEFORE you sign.
(3) Take photos of any defect in the property and have your landlord acknowledge they exist. Don't blindly sign that the property has no defects. Insist on a walk-through PRIOR to signing.
(4) Check out the landlord. Ask tenants in the building about him. Do your research BEFORE you sign.
This is a very short list. The main thing to do is to contact a competent realtor or attorney and understand the contract.