how can I lower lag?

[TimeofSand]

How can I lower lag and help rezzing better?

[valerie Inshan]

Some tips and explanations are in these links (from the Firestorm team, but it applies to any viewer).

http://wiki.phoenixviewer.com/fs_very_laggy

http://wiki.phoenixviewer.com/lag

[Lindal Kidd]

• Check the quality of your internet connection.  See here: http://blog.nalates.net/2011/10/26/troubleshoot-your-sl-connection/
• Set your bandwidth at about 70% of your measured download speed, but not more than 1500 kBps
• Get a faster graphics card.  The Nvidia GeForce cards are the best for SL, in my opinion
• Turn off shadows
• Turn off reflections
• Turn off Advanced Lighting Model
• Reduce antialiasing to 2X or off
• Reduce your draw distance
• Increase the size of your texture cache

If you have a very low powered computer that just won't perform well with SL, consider the SLGo subscription service offered by OnLive.  This offloads a lot of the work onto their servers.  Cost is $10 per month.

Finally, lower your expectations.  Second Life is very inefficient, an unfortunate consequence of being designed to permit user-generated content.  It will not perform like graphically-intensive computer games you may be used to.