Preparing well-considered application materials is of course an important part of the internship and/or job pursuit — however, within many industry niches, disciplines, and practices, design of these documents, at both the macro and micro level, are evaluated very closely, and in some cases, more closely than the conventional content detailing roles and experiences, etc.
Generally speaking, if you are positioning yourself as a designer or an art director (or similar role), you should never use a template to compose your resume — your materials need to reflect your own original visual language (designers should consider resumes and application materials as an extension of the portfolio as these will be evaluated as such by creative hiring managers and design leads at firms and studios). Think carefully about typeface choices, structure, relationships. Please review specific considerations for the designer’s resume and cover letter. Many alums and young professionals will include their resumes on their portfolio sites — review for ideas and inspiration, but never lift any design or other content from your peers (considered a violation of academic and professional integrity).
If you are applying for a position outside of a creative recruiter’s realm — say, an account executive or planner — consult more conventional resume tips and insights but definitely consult with a career coach and/or alum working in the field to help guide your approach. Review a standard action word bank to help diversify your language in a resume, cover letter, or other materials.