Exchange Administration - Daily Tasks

Hi Members,

We Have Following Exchange Server 2007 Ent Setup

2 Mailbox Server

2 HUB + CAS

2 Edge 

Now I am hire as Junior Exchange Administrator , Nowadays i m just doing task like creating account ,  queue on HUB & Edge and Message Tracking on MailBox.

Now I want to know what are further day to day duties of a GOOD Exchange Administrator

Can Some one pls guide me like what should i do as my daily or weekly task like logs views,health of exchange boxes,database health or others

Pls help