New college freshmen, get to know your professors early on. In your later years, good relationships with professors can lead to recommendations, research, and job opportunities.
I got to know one of my profs, then became research assistant for him during undergrad, and was offered a master’s with great scholarship. Thing is you don’t need to kiss your profs ass. Just sit in front of class, ask intelligent questions and nod when you see him. Point is to just let him know you exist.