I love my Lilly Pulitzer agenda! The one I have here is the jumbo size - it's perfect for me as a busy mom, business owner, and blogger. I can easily organize everything I need to do for work as well as all the kids' activities and all of our family activities. How do I organize it? I love these Staedtler pens - they have a super fine 0.3mm tip and don't dry out easily. I highlight with Sharpie's retractable markers and I love using washi tape throughout to block out dates for certain activities.
For a detailed look at what the whole agenda looks like - I have a blog post dedicated to an overview of the agendas.
Dates worth celebrating are all written down so I don't forget.
My monthly view is color coded so I can see what I need to do for who at a quick glance.
And I love the lined note pages in the back for brainstorming blog post ideas.