1. Saved Searches
To create a saved search, just type your query into the search box and click the red button, 'Save this search'. To access it, just click on 'Explore' in the navigation ribbon and you'll see it hiding under 'Trending' on the right-column of the stream. Alternatively, you can find them all the way at the bottom of your list of circles from the circles quick-list on the home stream.
To remove a saved search, click on the one you'd like to remove and there'll be a "Remove saved search" button next to the cog menu on top of the stream.
Saved searches are useful if you find yourself typing the same query frequently. I save my favourite hashtags so I can easily view the respective stream in a click.
2. Customisable Navigation RibbonYou can actually re-order the icons on the navigation ribbon. It's easy! Just click, hold and drag an icon to where you'd like it to be. If you don't use a feature much, just drag it to "More".
3. Download Data Utility
4. Official Google+ Chrome Extensions
|Now there's no excuse not to plus|
5. Add Email Addresses to Your Circles
Have a favourite little known G+ feature? Share it in the comments or in our community!