Whenever i smoke i get very creative. what's an alternative?

I'm a writer, but I don't usually smoke. However, my friend gave me a cigarette, and I found that my writer's block was gone! I don't want to start smoking. I know the detrimental effects. What is an alternative that can give me the same creative burst? I've heard of scientists using brain enhancing drugs. What is a safer alternative (and legal one) to smoking? btw caffeine gives me jitters so not that please!!!