Packet* loss is normally due to a poor connection between you and the server.
You can try some basic steps like:
Closing your web browsers, Messengers (like Skype, MSN and Yahoo), and not using streaming software (like Spotify or Pandora One).
These may allow a clearer connection which may effectively reduce the problem;
If you are on WiFi, try connecting directly to your modem or router with a LAN cable.
Additionally, you can try calling your ISP and bit*hing to them; Likely they won't be able try to do anything to fix it.