When creating a new post or editing old posts, add labels (separated by commas) in the bottom right where it says ‘Labels’. Then Add a Gadget called ‘Labels’ to your Sidebar. Configure and save.
From your Blogger Dashboard, click Design Make sure your on the ‘Page Elements’ Tab Click ‘Add a Gadget’ on the side bar Look through the different categories, select gadgets of interest Adjust settings if deisred. Then Click ‘Save’. Click and drag the gadget into the order you want. Click Save again in the upper right.