There are various ways to give a command or an instruction. Nosotros commands are commonly used as they use the Nosotros part of the verb and therefore include yourself.  The translation would be Let´s do something 

In order to form the positive nosotros command begin with the nosotros part of the verb.

AR verbs

e.g. hablamos.  AR verbs will take the ER ending EMOS – HABLEMOS 

ER verbs  

e.g. comemos.  ER verbs will take the AR ending AMOS – COMAMOS 

IR verbs

e.g. vivimos.  IR verbs will take the AR endings AMOS – VIVAMOS

In order to form the negative Nosotros command simply add NO before the positive command.