Not that I have an actual problem. I just want to make sure that my mac is optimzed the best it can be for my internet connection. Any settings that I should look into or change? os x, linksys router, etc? Especially with the router as there are settings that I am unsure what their purpose is.

I have
os X 10.3.9
linksys voip router model RTP300
Motorola surfboard cable modem model SB5100
I pay for 7Mbps downstream and 800kbps upstream from my isp.
I average around 5.3mbps to 6.1mbps downstream.