Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Useful collection of essays for the freelance writer

Instead of just setting down a list of dos and don'ts, the ASJA guide presents a series of how-to essays by published authors that include how to work through the different aspects and challenges of freelance writing. This format allows for experience to provide guidance. I like to read about success stories and examples of what worked and what didn't work. I have used it many times to figure out different aspects of our freelance writing business.