Go for a walk, listen to music, or do something unrelated to writing. Often, the best ideas come when you’re not actively trying to force them. You don’t have to love writing to be a great ...
"Fetch me some biscuits." In this example, 'fetch' is the imperative verb. You should also use commands when you are writing instructions telling someone how to do something.
When writing a paper, the focus should be on providing novel ... But actually, experimental results are just proof of new discoveries. Small improvements in results don't always mean new knowledge.