If you are using Google+ and Twitter, and updating same things on Google+ and Twitter, the service available on ManageFlitter may be helpful for you. You can easily setup this. have some aditional features, which will help you to decide whether to add it to Twitter or not.
Options available are
Only share Google+ posts including the tag #twt
Add "G+:" to the start tweets created
Share Google+ hangout sessions
Always include a link to the original Google+ post
1. Visit the Google+ To Twitter page
2. Connect your Twitter account, authorize the access
3. Set Advanced settings if you want
It got tweeted after 3 minutes
It may take 5 Minutes to 1 Hour for your Google+ updates to get tweeted.