cover letter and resume

It took longer than I expected to update my resume and create a cover letter. Ive worked at several establishments but only a few that had anything to do with the intern position that I was seeking. Because I didn’t want my resume to exceed one single page, I had to do lots of editing. My goal was to provide up to date contact information as well as education and employment history relevant to  my targeted position. If anyone has tips or advice for me to improve my resume and cover letter i would really appreciate it.. Thanks.