Adam Smith narrates his blog written for NIHR Dementia Researcher.
At some point, there comes a time when every early career researcher will need to email a strange Professor (well strange to them, but perhaps also 'strange' they sometimes are). You probably want something from them - you're looking for a supervisor, a job, a review...
This blog from Adam may just make the different between getting a reply, or getting ignored - How to write successful cold emails.