How to convince my boss to send me to Dreamforce?

That is not even a problem mate! Go use the pre-prepared template to convince your boss to send you to Dreamforce. It goes something like this ". I'd like to register before it gets too expensive. I'll be sure to submit a post-conference report that will include an executive summary, major takeaways, tips, and a set of recommendations to maximize the return on our current investments in Salesforce. I can also share relevant information with key personnel throughout the company.
In addition to 1,500+ breakout sessions, the conference gives me the chance to problem solve with Salesforce employees and 400+ partners showcasing over a thousand integrated solutions"
Dreamforce Conference Proposal link here - http://www.salesforce.com/dreamforce/DF15/why-attend.jsp