As a Commercial Pilot, you will need to master following:

• air traffic control operations
• air transport law
• aircraft flight control systems
• airport planning
• apply airport standards and regulations
• apply signalling control procedures
• aviation meteorology
• balance transportation cargo
• civil aviation regulations
• common aviation safety regulations
• comply with air traffic control operations
• ensure compliance with civil aviation regulations
• follow airport safety procedures
• follow ethical code of conduct in transport services
• implement airside safety procedures
• operate two-way radio systems
• perform flight manoeuvres
• perform routine flight operations checks
• perform take off and landing
• pre-flight procedures for IFR flights
• respond to changing navigation circumstances
• use meteorological information
• work in an aviation team

More generally, a commercial pilot is also versed in:

• apply company policies
• ensure ongoing compliance with regulations
• execute flight plans
• geographic areas
• have spatial awareness
• identify airport safety hazards
• make independent operating decisions
• operate cockpit control panels
• operate radar equipment
• operate radio equipment
• operate radio navigation instruments
• perform risk analysis
• read 3D displays
• read maps
• undertake procedures to meet aircraft flight requirements
• use different communication channels
• visual flight rules
• write work-related reports

It also helps to know the following:

• create a flight plan
• adapt to changing situations
• listen actively