Whatever field you’re in, reading can only help. Go to the library and check out some good books – and don’t make all of them ones in your area of expertise. Why not get a novel you’d never normally read, or a book about a topic you have no knowledge on? This can jump-start your brain into working more creatively as you try to assimilate the new information based on what you already know from your own field.
Another way to get your brain in gear is to try something totally new. Whether it’s salsa dancing, pottery or a medieval reenactment, taking up a new hobby can help shake things up and encourage you to think laterally. For example, you might be inspired to write an article using your new interest as a metaphor for something in your main field of work.