Updating and maintaining data stored from received packets.

Problem with running application.

Explaining what the hell is going on in a concise way.

Any optional additions to features.

Planned additions to application.

General user interface appearance.

Any handlers that make GUI components function.

Opcodes used to build and parse packets.

Any improvements to performance.

Fixing or improving anything to do with communication units.

Ensuring that code does what it is supposed to to prevent stagnation later on.