RMAN Recover

Full DR recovery - Full Example (restoring to a different machine)
Point in time recovery - Full Example (restoring to the same machine / different date/time)
Restore and recover the whole Database:

RMAN> STARTUP FORCE MOUNT;
 RMAN> RESTORE DATABASE;
 RMAN> RECOVER DATABASE;
 RMAN> ALTER DATABASE OPEN;

Restore and recover a Tablespace:

RMAN> SQL 'ALTER TABLESPACE users OFFLINE';
 RMAN> RESTORE TABLESPACE users;
 RMAN> RECOVER TABLESPACE users;
 RMAN> SQL 'ALTER TABLESPACE users ONLINE';

Restore and recover a Datafile:

RMAN> SQL 'ALTER DATABASE DATAFILE 64 OFFLINE';
 RMAN> RESTORE DATAFILE 64;
 RMAN> RECOVER DATAFILE 64;
 RMAN> SQL 'ALTER DATABASE DATAFILE 64 ONLINE';

Restore the Control file, (to all locations specified in the parameter file) then restore the database, using that control file:

STARTUP NOMOUNT;
RUN
{
ALLOCATE CHANNEL c1 DEVICE TYPE sbt;
RESTORE CONTROLFILE;
ALTER DATABASE MOUNT;
RESTORE DATABASE;
}

Restore Validation confirms that a restore could be run, by confirming that all database files exist and are free of physical and logical corruption, this does not generate any output.
Example:

RMAN> RESTORE DATABASE VALIDATE;