While the developers are busy with the big game launch, and before they release a patch to resolve all these issues, you can refer to the Fallout New Vegas Guide below for workarounds to all these issues. Errors, crashes, freezes, low performance on the game, Fallout New Vegas save bug, and lot of other issues that are needed to be addressed by the developer, Obsidian.
Fallout New Vegas has just been released and already, they are many who are facing game-breaking issues.