To begin with, you should check credibility of the proposed tenant by asking him to furnish references from previous landlords. 

If you are a unit holder, seek veto right to protect own interests as against decisions by developer/majority unit holders who may be directly dealing with the tenant. 

As a person renting out his property, it is desirable for you to have the agreement with a strong seek lock-in period. 

Within this period, the tenant will not have the right to terminate the lease. If he does so, then he will be legally obliged to pay lease rent for such period. 

Remember that the tenant needs to pay applicable stamp duty on lease.

Retain the ability to sell/transfer/mortgage lease property without involving the tenant in this decision. 

Ensure that the agreement provides you the right to terminate the lease for breach of lease terms. 

Register the lease within four months of execution.