Know What Is Inside Your Game: The Sims 3

Other helpful links, that I have bookmarked:

Learn about things that can cause lag and corrupt your game:

http://forums.thesims.com/en_US/discussion/536956/bizarre-cause-of-lag-freeze-issue-1st-post-updated-8-26-13/p1

Learn about spawners and how they can lag your game, as well as other things:

http://forums.thesims.com/en_US/discussion/523406/attention-ll-owners-and-everyone-else-spawner-alert/p1

Learn how to depopulate your worlds, where to find ghosts in worlds, and other goodies:

http://forums.thesims.com/en_US/discussion/759693/so-ive-been-thinking-about-murdering-everyone/p1

Learn about fixing some of the lag in IP:

http://forums.thesims.com/en_US/discussion/739971/fixing-ip-world-lag-compiled-from-another-thread#latest

Compare computer specs when upgrading:

http://forums.thesims.com/en_US/discussion/663997/definitely-worth-upgrading/p1

List of store things that come with textures (read the whole thread for all the items):

http://forums.thesims.com/en_US/discussion/517663/list-of-items-that-come-with-textures

Hawk's objects with unlocked stencils, plus no stencil options, so you get all you paid for from the store (NOT lots or mods):

http://forums.thesims.com/en_US/discussion/472820/updated-to-generations-old-hidden-stencil-thread

Custom World Index:

http://forums.thesims.com/en_US/discussion/560053/the-world-index/p1

Crinrict's entire blog!:

http://sims3.crinrict.com/en/welcome