If you've accumulated a ton of bookmarks, you'll love Safari's Bookmark search. Especially if you haven't kept them organized in folders.
1.
Click the Bookmarks button (the open book icon in the Bookmarks Bar) to open the Collections pane (on the left side of the window) and the results pane (on the right side).
2.
Click the magnifying glass icon in the search field at the bottom of the window. From the pop-up menu, choose to search in the selected collection (folder), or "In All Collections."
3.
Type a keyword in the search field. The results pane shows matching bookmarks.