Robert Cialdini writes in Yes!: 50 Scientifically Proven Ways to Be Persuasive,

An ounce of personalized extra effort is worth a pound of persuasion. the more personalized you make a request, the more likely you’ll be to get someone to agree that request. More specifically, this research shows that in the office or in the community, a personalized sticky not could highlight the importance of your reports and communications and prevent them from becoming the proverbial needle in a haystack of other reports, letters, and mailings that are also vying for attention. What’s more, the timeliness and quality of compliance with your request are likely to be enhance as well.