"Ten application tips" by Matthew Might:

• http://matt.might.net/articles/how-to-apply-and-get-in-to-graduate-school-in-science-mathematics-engineering-or-computer-science/

Get into Your Dream Program with a Great Grad School Application Package: 

• https://www.engineering.com/story/get-into-your-dream-program-with-a-great-grad-school-application-package

"Lessons for Aspiring STEM Grad Students" by Pedro Márquez-Zacarías:

• https://blogs.scientificamerican.com/observations/lessons-for-aspiring-stem-grad-students/

How to choose an advisor by Howard G. Adams and Ashwin Ram:

• http://www.cc.gatech.edu/faculty/ashwin/wisdom/how-to-choose-an-advisor.html

Grad School Application: How to Stand Out By Reese Lopez

• https://www.affordablecollegesonline.org/college-resource-center/how-to-create-a-standout-graduate-school-application/

Asking for a Letter of Recommendation: Do's and Don'ts by Tara Kuther:

• https://www.thoughtco.com/dos-and-donts-requesting-recommendation-letters-1685921

How to ask for a reference letter by Adam Chapnick: 

• https://www.universityaffairs.ca/career-advice/career-advice-article/how-to-ask-for-a-reference-letter/

How to Ask a Professor for a Letter of Recommendation by Karen Kelsky:

• http://projectgraduateschool.wordpress.com/2011/03/08/how-to-ask-a-professor-for-a-letter-of-recommendation/

Letters of recommendation for graduate school: Who are the best sources?  by Dave G. Mumby: 

• https://mygraduateschool.wordpress.com/2012/11/01/letters-of-recommendation-for-graduate-school-who-are-the-best-sources/