Tags are great, but unfortunately, you cannot sort notes by tags, only filter, which means you'll never see everything. I use the following workaround:
I defined a number of icons for different types of notes:
🗄 .Reference Materials
🗂 .Index / Table of Contents
📑 .Working Documents / Work in Progress
🗓 .Meeting Notes
💡 .Thoughts & Ideas Notes
✅ .Next Action Steps
🔥 .Inspiration
💥 HOT & IMPORTANT right now
🤔 Someday/Maybe
I add such an icon to each note, and then sort the notes by title. Evernote will show the notes with the same icons nicely as grouped.