Calculate disk space occupied by each schema in SQL Server

SELECT SCHEMA_NAME(so.schema_id) AS SchemaName
,SUM(ps.reserved_page_count) * 8.0 / 1024 AS SizeInMBFROM sys.dm_db_partition_stats psJOIN sys.indexes i ON i.object_id = ps.object_id
AND i.index_id = ps.index_idJOIN sys.objects so ON i.object_id = so.object_id
WHERE so.type = 'U'
GROUP BY so.schema_id
ORDER BY OBJECT_SCHEMA_NAME(so.schema_id)
,SizeInMB DESC

Space occupied by each Schema in SQL Server database

SELECT  SCHEMA_NAME(so.schema_id) AS SchemaName
               ,SUM(ps.reserved_page_count) * 8.0 / 1024 AS SizeInMB
        FROM    sys.dm_db_partition_stats ps
        JOIN    sys.indexes i
          ON    i.object_id                                     =           ps.object_id
         AND    i.index_id                                      =           ps.index_id
JOIN sys.objects so
  ON i.object_id = so.object_id
       WHERE    so.type = 'U'
    GROUP BY so.schema_id
    ORDER BY OBJECT_SCHEMA_NAME(so.schema_id), SizeInMB DESC

Find what script is being run by specific SPID number

DECLARE @sqltext VARBINARY(128)
SELECT @sqltext = sql_handle
FROM sys.sysprocesses
WHERE spid = 53
SELECT TEXT
FROM sys.dm_exec_sql_text(@sqltext)
GO

List of services started automatically by Windows that you could consider stopping

# DHCP Client: On most servers, IP addresses are fixed and DHCP is not needed.

#DNS Client: This caches DNS names locally.

#Network Location Awareness: This collects and stores the configuration information

for the network and notifies the programs when this information is modified. You can't

disable it unless you use the Windows 2008 Advanced Firewall.

#Print Spooler: This loads the files to the memory for printing later. It can be disabled

if you don't print from the server.

#Windows Error Reporting Service: This allows errors to be reported when programs

stop working or responding, and allows existing solutions to be delivered. It can safely

be disabled.

#Windows Firewall: You can disable this service, if you are using a network firewall.

#Shell Hardware Detection: This activates AutoPlay for removable devices.

On Windows Server 2008 R2, this service stops when nobody is logged in,

to minimize risks. You can disable it.

Reference: Microsoft SQL Server 2012 Security

Cookbook