Yes. Skyrim has an infinite save system. Creating a new game will create a new file, leaving your previous one there. When you start playing that newly created one, the old save files will be pushed to the bottom of the list. So simply scroll down until you see your old character and choose the file you want to continue that playthrough.
It is loading, be patient
In a parallel circuit an electrical load may be disconnected without affecting other loads.
You can go load a past save, but unfortunately you will loose any progress that came after it.
Getting your character lodged into places is an unfortunate occurrence in Bethesda games and the only way to become unstuck is to reload. Luckily, Skyrim offers about three autosaves, all very current, that you can use to load from.
The Skyrim console command for nails depends on how many official DLCs you have.The console command is xx0300f. You need to replace the xx for either 02, 03 or 04 depending on the load order of your Hearthfire DLC.
I don't think you can on Xbox 360, It might be possible with a load of hacking through your computer or something.
The only way you can redo a quest is if you make a save before you do it, This way once you finish the guest you can just load your save. :)
The point at which stress goes on increasing without much load is called the critical load.
If you have the game for PC, the load order for your plugins may be incorrect. Look at the files' Readme texts, and/or download BOSS to fix this. Or you could deactivate your plugins altogether. If you don't have the Nexus Mod Manager, the plugins can be found on the Skyrim launcher.exe under Data Files.
Live load is a load on the object other than the load from itself.
Without a load the secondary current is zero, by definition.
All of the Skyrim models (or models from games developed by Bethesda Studios in fact) are in the NIF format. To view them, you need to have the NifTools plugins for your 3D program. I only know of plugins for Maya, Blender and 3DS Max, but there may be one for GMax. Also, Skyrim uses a different NIF header that won't load into older tools. Rest assured that the Skyrim modding community is growing rapidly and people are always working on ways to edit every aspect of the game.