During an interview, professional business writer Marcus Buckingham said, “I don’t think about rules at all [while writing]. Split infinitives and so forth? I split infinitives all the time. I don’t care much about that stuff. I try to write aggressively, with purpose.”
Research backs up this approach. Mike Rose, Professor of Education at UCLA, came to this conclusion about the composing process of freshmen college students:
“There lies the irony. Students that offer the least precise rules and plans have the least trouble composing. The five students who experienced blocking were all operating either with writing rules or with planning strategies that impeded rather than enhanced the composing process. The five students who were not hampered by writer’s block also utilized rules, but they were… few and functional… less rigid ones.”
Professional writers only keep a handful of pragmatic, easy-to-apply rules in their heads while writing, such as, “Is what I just wrote clear?” “Does this idea logically flow from my previous idea?” “Can I write this more simply?” You should do the same.