Before you sift through your hundreds of new emails, voice messages and start on that task you've been putting off all week, grab your morning coffee and set out a schedule for your day. Seems simple enough but this is the number one rule to increase productivity.
Set a timer for each of the tasks and layout when you're going to get each task done by. e.g.
8.30-8.45am - Plan day
8.45-9.45 - Reply to emails, phone call, chase up supplies
9-45-10.30 - Go over blueprints for the Jones' job
10.30-10.45 - Morning break