Negotiating Selling Commissions and Fees

[Jeff Smith]

I am wrapping up my first house flip this week and I have started speaking with the agent who helped me buy the same house in order to sell it. She sent me her listing agreement and the commission shows the standard 6%. I want to negotiate to get the best commission rate and drop it by 1%. In exchange, there is another property in the same neighborhood that I intend to flip and work with this agent again to sell. 

The other question I have is how to negotiate with title companies and others to drop their fees. What fees are easier targets to try and get waived or reduced?

How would others go about negotiating the commissions or the fees? What are your successes? What negotiations did not work?