The concept experience is a vital matter of fact in life of human being, which helps people move forward for the next phases of their lives. Also, this phenomenon is regarded to be the key word for education and teaching. This study aims to explore experienced teachers’ suggestions for the prospective teachers to adopt themselves to the requirements of students, school administration, lessons and being a teacher in their careers. A qualitative research methodology was followed in this descriptive study. A post “What are your suggestions for prospective teachers of English?” was sent to the most crowded five groups of EFL teachers on Facebook. The comments of 103 participants were content analyzed using Microsoft Excel 2010, and they were categorized under nine main headings. Suggestions were mostly about personal characteristics, use of variety, taking different courses, love, being aware of differences, gap between theory and practice, negative suggestions, difficulties and others. In the light of the findings, it could be stated that most of the in-service teachers have attached importance to personal traits as a teacher. ‘Being knowledgeable’ was the most reported answer among the suggested personal traits. In-service teachers also suggested the prospective teachers to make use of variety, to take different courses before they graduate, and to love their students and their jobs. Moreover, they expressed difficulties of being English teachers such as lack of respect and working at private schools. Though they are few, participants also had negative suggestions for prospective teachers. Few of them suggested them not to be teachers and look for other jobs. In the light of these results, some suggestions were presented to prospective teachers at the end of the study.