Make use of the functionality within EndNote to categorize and retrieve items.
Searching: Use the dropdown menu to search the various fields. All fields in a reference are searchable, including any annotations you have made in the PDFs.
Simple Search
Advanced Search
Sorting: The folders or groups containing references are sorted alphabetically on author name as default. Every column header is clickable and can be sorted ascending or descending, depending of how you like it.
Reorder columns: You can change the order of your columns by dragging and dropping them in the order you like.
Remove/add columns: You can choose which columns you want to be visible in EndNote by right-clicking the column header and check/uncheck wanted/unwanted columns.
Resize columns: The size of the columns can be changed by dragging them sideways.