Daily Monitoring T_Codes:

SICK - SAP Initial Inconsistency Check
SM04 - User List
SM51 - SAP Servers Overview (Associated on one host)
SM50 - Process overview
SM66 - Global Work Process Overview
SM12 - Select Lock Entry list
SM13 - Update Requests: Initial Screen
SM21 - System Log
ST22 - ABAP Runtime Error
ST03 - Workload Monitor
ST04 - Performance Overview
ST02 - Tune Buffer summary
DB54 - Change View "Logical Systems":Overview
SMLG - CCMS: Maintain Logon Groups
SMGW - Gateway Monitor
SMMS - Message Server Monitor
AL11 - Display SAP Directories
SICF - Maintain Service
SMICM - ICM Monitor
SLICENSE- SAP License Administration
AISUSER- SAP Support Portal User Maintenance Assignment

DB01 - Database Lock Overview
DB02 - Space Overview
DB12 - Backup Logs: Overview for Database
DB13 - DBA Planning Calendar

SM01 - Transaction code: Lock/Unlock
SM02 - System Messages
ST01 - System Trace