Designing a 7-day gratitude experience PDF for a gratitude life coach Jessica Lee Devenish required a combination of creative, technical, and research skills.

Gratitude Knowledge: Understand the concept of gratitude and its psychological benefits.

Coaching Principles: Understand the role of a life coach and how gratitude can be incorporated into coaching.

Research: Delve into existing gratitude practices, exercises, and scientific findings to shape the content of the PDF.

Content Editing: Edit content in such a way that is easy to understand, actionable, and inspiring for users. This included daily exercises, prompts, quotes, and reflections.

Graphic Design: Develop an attractive layout, incorporating images, icons, and infographics. Use design software to achieve objective.

Typography: Select appropriate fonts and sizes for headings, subheadings, and body text, ensuring readability and visual appeal.

Color Theory: Understand and implement a color palette that induces feelings of calm, positivity, and gratitude.

Flow and Navigation: Ensure that the 7-day Experience is easy to follow with a logical progression from one day to the next.

PDF Creation: Use software tools to create a high-quality PDF that's accessible across different devices.

File Size Management: Ensure the PDF is optimized for download without compromising on quality.

Client Communication: Regularly consult with the client to ensure the content aligns with their vision and objectives.

Feedback Incorporation: Be open to feedback and revisions to refine the content and design based on the client's insights and pilot tests with potential users.

Error-Checking: Scrutinize the content for any grammatical, spelling, or factual errors.

Test the PDF: Ensure that all interactive elements function as intended and that the document displays correctly on various devices and platforms.

In essence, creating this 7-day Gratitude Experience PDF required a well-rounded skill set. I was required to not only produce an aesthetically pleasing document but also ensure the content was accurate, valuable, and true to the client's approach and values.