Review the lease.
Carefully review all of the conditions of the tenancy before you sign on the dotted line. Your lease or rental agreement may contain a provision that you find unacceptable — for example, restrictions on guests, pets, design alterations, or running a home business.

Get everything in writing.
To avoid disputes or misunderstandings with your landlord, get everything in writing. Keep copies of any correspondence and follow up an oral agreement with a letter, setting out your understandings. For example, if you ask your landlord to make repairs, put your request in writing and keep a copy for yourself. If the landlord agrees orally, send a letter confirming this.

Protect your privacy rights.
Next to disputes over rent or security deposits, one of the most common and emotion-filled misunderstandings arises over the tension between a landlord’s right to enter a rental unit and a tenant’s right to be left alone. If you understand your privacy rights (for example, the amount of notice your landlord must provide before entering), it will be easier to protect them.

Talk to your landlord.
Keep communication open with your landlord. If there’s a problem — for example, if the landlord is slow to make repairs — talk it over to see if the issue can be resolved short of a nasty legal battle.