First, and foremost writing for work or business communication is very different then writing for your English or history class. Business writing is the communication or exchange of information in a written format for the process of business activities. It can take place between organizations, internally or between the customer and company.
Writing for work is a basic component of your job - an internal memo, feasibility report, financial report, analytical report or a marketing report.
Keep in mind it's a busy world, busy people do not have the time to read lengthy documents, most just scan for the key points. Business/work related documents need to be clear and easy to read. Reports, memos and emails... should be inviting to read with bullet point and headings.
Effective business writing follows the 10 c's:
Keep in mind business writing is: