Columbia is Ivy Leauge so standards are high. Ranked #4 in the United States, they are very selective. Columbia College and Engineering  is the hardest 

• Get a GPA good GPA above 8.5 as well take as much electives classes you can!
• Do a decent amount of extracurriculars, this would show Columbia that you are a well-rounded student
• Get a SAT between 1350–1560 this would give you more chances to get in.
• Make your recommendation letters the best, chose carefully which teachers to ask for this ones.
• Apply early!! this would show Columbia that they are your main priority.
• In the interview try to show your true self and ask a lot of questions to the interviewer.