1) Resume only rejection based recruitment
2) Prior and Lack of investigation into the actual role needed
3) limited or poorly written Job descriptions and Qualifications ( poorly written, Not relevant, poorly understood, generic, written by hiring manager, not accurate. too specific or too general...)
4) Thinking for today need vs. future need (box A needs candidate A, when a Candidate B has done it plus has C and D)
5) Hiring people "like themselves" vs. people qualified with competencies to achieve more.
6) Ill equipped or ill trained interviewers
7) A lengthy decision making process or indecisiveness
8) Having interviewers, candidates or applicant's work prior to hiring
9) Not being responsive, respectful or grateful or being misleading, inconsiderate
10) Doing what everyone else is doing instead of what is right for your company, culture or candidate.