I've noticed that there are many newer corps trying to become involved in PC and are being met with lag issues, so I figured I should share some of the common practices that most PC players do in order to REDUCE lag :) I'm aware that some of this is common knowledge, but bare with me!
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Reset: This is the MOST important thing to do before every PC battle. After each and every fight make sure to turn your PS3 off, wait about 10 seconds, then proceed to turn it on and log back into dust.

Chat Channels: Try your best to keep the amount of chat channels you have to a minimum. Before a PC make sure to delete any chat channels that are not a necessity to have.

Contacts: This kind of goes for the game in general. Try to not have a massive wall of contacts, myself and several others have noticed that this will make your match more laggy.

Graphics Quality: Go into your settings and make sure your graphics quality is set to "Low". This should also help with some of the lag you may encounter during PC.
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If anyone else has suggestions to eliminate lag feel free to post them here and I will add it to the OP. Thanks guys :)

Hop on the interwebs and youtube search reducing ps3 lag. There are more options to check out. Like for instance running in 480.