If you're like me, you never have your best ideas when you're sitting at your desk. It is always when you're out walking or talking to someone or driving in your car.
Then by the time you get somewhere where you can write it all down and think about it, you have forgotten the idea.
My tip is to get really well acquainted with the voice recording app on your phone. Anytime I have a random thought or idea, I just open it up and start recording. Sometimes I capture entire blog posts, and sometimes it's just a bunch of quick titles. Either way, I have a record of things I can use to create great marketing.
Don't be tied to your desk, get out and experience things. Just take your recorder with you.