We've talked about how ManageFlitter is useful for managing your Twitter account and raising the signal to noise ratio in your stream. The service now also automatically sends your public Google+ posts to Twitter, as long as you have the service connected to your Twitter account.Unlike previously mentioned Agent G, ManageFlitter doesn't require you share items with circles that include it, and doesn't run the risk of being shut down by Google for being a non-human account. Give ManageFlitter your Google+ profile URL, connect it to your Twitter account if they're not connected already, and you're all finished.
Anything you post publicly on Google+ will be syndicated at Twitter, with a link to the original post. If you want more control, you can add the #twt hashtag to your Google+ posts and ManageFlitter will only republish those entries. Do you want to cross-post across networks or keep them separate? Share your thoughts in the comments.