The following websites are excellent resources to inspire creative sermon writing:
Academy of Preachers
The Academy of Preachers seeks to Identify, Network, Support and Inspire young people in their call to Gospel preaching.
Patheos – Preachers
Patheos.com is the premier online destination to engage in the global dialogue about religion and spirituality and to explore and experience the world's beliefs.
Working Preacher has been a trusted source of inspiration, interpretation and imagination for preachers across the globe -- all for free.