TL;DR
The Too Long; Don't Read for Internships.
Resumes
LaTeX
LaTeX is a programming language generally used in technical and scientific documentation. Read more here
While not required, it is highly recommended to use LaTeX when formatting your resume. Overleaf is a great online editor for LaTeX. Applications written in LaTeX are easier for ATS (Application Tracking System) to automatically fill out fields such as skills or education. Read more about Overleaf here
Applications
Applications can be annoying and tedious, but there are a couple of things that hiring teams are specifically looking for when filling a position such as education, experience, and relevant skills.
Skills
It may be annoying to individually input each skill into this section of an application when they're already listed on your resume, but hiring teams will use this to search for candidates with skills which match their open internship position.
Interviews
Normally hiring teams will go through multiple interviews before extending an offer to a candidate. You want to stand out in a positive and memorable way.
Ask Questions
It is very important to ask questions when the hiring team asks if you have any questions. Not asking a question may communicate to the hiring team that you're disinterested in the position and you are less likely to be extended an offer.