While not an actual guide, this glitch warrants mentioning and does work on the Xbox 360 version.
At any point in Dead Space 3, you can set a scavenger bot down on a high yield resource gathering point. Save and Quit, then run right back to the exact same high yield resource gathering point and set another scavenger bot down for additional high resource gathering!
With infinite resources, create dozens of large health packs, stasis modules, and ammo stacks to boost your advantage over those frostbitten necromorphs.
In addition to this bug, at the end of Chapter 8, there's a special door that has its own glitch. No need to sit around for 10 minutes waiting for your bots to work. Follow the video* below to find this special door that always generates a random item every time the door closes.
You can also come back to this same door at the end of Chapter 9 after you fix your RIG and no longer have to worry about the cold temperatures.
Exploiting this glitch can make completing the game with one life much easier, but note that enemies also respawn, so stay well-stocked.
*Posted with creator's permission