Hopefully you have identified all of the systems you have that are vulnerable to heartbleed.
If not, you should look at this http://www.vulninfo.com/index.php/heartbleed-detection/

If you have a large number of hosts on the internet, it may take quite some time to get them patched.

You can buy yourself some time with this heartbleed honeypot script.

The idea being, setup an isolated throwaway VM running this script, PAT/NAT it out to your entire public IP range and give scanners/bots a haystack of results to sort through.

Download the script HERE if the above link stops working.