The Interest Post
This is an experiment I started last year geared towards connecting and networking with more folks here on Google+ who are interested in similar topics. Aside from individual topic-specific posts and your profile, this works as another piece of content other Plusers can discover you by.
I call it The Interest Post ( #TheInterestPost ). Feel free to do one for your circles, as well, but remember to make it Public if you want to maximize the exposure. See mine below, as an example...
Here is mine, subject to further additions.
(broad subject: topic - topic - etc)
Web Design & Development: Web Strategy - User Experience - Wordpress - Mobile Application Development
Internet Marketing: SEO - Email Marketing - Social Media Marketing - Blogging
Oceans: Scuba Diving - Coral Reefs - Live Rock Aquaculture - Sharks - Ocean and Reef Conservation
Marine (Saltwater) Aquariums: Coral Propagation - Marine Fish & Invertebrates
Travel: Florida Keys - Caribbean - Bahamas
Cars: Shows - Drag Racing - Drifting - Turbos - Mopar
Ice Hockey: Anaheim Ducks - Toledo Walleye - NHL - ECHL
TV Shows: LOST - The Walking Dead - Hell on Wheels - The Office
Misc: Photography - Technology - Music
Give it a whirl and see if any like-minded Plusers find you! Don't forget to tag it: #TheInterestPost