Google+ got all our attention, but at the same time Google humbly push a revamped version of Google Calendar to live!
Just a casual sharing of my Foursquare experience.
1. Never check in your HOME!
Checking in everywhere is funny, but revealing where you live is not! It's no way we let strangers know our address for the sake of playing location-based services.

Same applies to your office locations, except your working place has already been exposed.
2. Link up Facebook and Twitter - Intelligently
Foursquare allows you to share your locations through two most popular social networks - Facebook and Twitter! Go to settings, and you can publish your locations on Facebook and Twitter.
Even though you connect Foursquare with Facebook / Twitter, you could select which network you would publish your whereabouts every time you check in. So in case you don't want to spam your Facebook friends so much, you may select publish only some of your check-ins.
3. Don't tweet mere check-in
Sharing locations is interesting, but keep send location-only tweets could easily annoy your friends. Actually when you check in, Foursquare allows you to append a simple status to the location information.
My advice is posting what you do accompanied with the locations, otherwise, avoid shout out your locations to Twitter / Facebook that many times.
4. Use location-based photo sharing services
If you don't have anything to say when you send your check-in tweets, why don't you send a photo. There are many location-based photo sharing mobile apps out in the market. Try them to add some value to your geotagged tweets.
5. Understand Badges
Foursquare offers many Badges for users to unlock. Check out how you could claim them, so that you could earn them more effectively, especially during you are on vacation! Check out how you get Badges here!

6. Look for offers
Okay, I know that there are limited places offering discounts for check-in and mayors in Hong Kong, but it's still a good habit for us to go through places on Foursquare before deciding where to have lunch or dinner.
Hootsuite comes to Android eventually.....
Updating status is the simplest way to share our lives. We have many channels to update status, namely Facebook, Twitter, as well as instant messenger. Actually we are much more intensively using Social Network sites than a year before. Nelson released a report suggests that our consumption of Social Media sites raised 82% -- comparing Dec 09 with Dec 08 and 07.

Facebook doesn’t seem to count in that figure the millions of links and photos shared by its users as status updates, nor would it count comment threads. Whereas on Twitter, every tweet is just a tweet.
