Using "l" statements and action verbs when describing your experience is not the tip while presenting a distinct and effective cover letter.
Step-by-step explanation:
Cover letter can be considered as a sales platform. It is the tool which highlights your unique selling point to the company. Instead of using statements repeatedly about your opinions, your wants and needs in the cover letter, you must consider the needs of your prospective employer and you must write what you would contribute to the organisation in a positive note.
Review the job description of the company and also know why the organisation is wanting to hire you for the specific role. When you relate to the hiring employers' needs and concerns there is a better chance of making your cover letter sound distinct and effective instead if blowing your own trumpet by using I statements.