What I do to store bits and bobs is use those re-sealable polythene bags such as these
http://www.ebay.co.uk/itm/like/27118169 ... =95&ff19=0
you can write on the bag what the contents relate to, for example, drivers side door bits, or "Bonnet bits", etc etc.
Also, get some large cardboard boxes to keep larger assemblies together, such as door glass, and all the frame and bits inside the door.
As you are taking sections of the car apart, photograph everything with a digital camera or phone, download the photos to a computer (I prefer iPhoto) and organise the photos into folders for separate areas of the car. The photos will also look great on your build thread on an internet forum
Also make notes, line drawings, measurements in an A4 book. Also make lists of parts you need to order and write out a plan and break the plan down into daily tasks.
If you are doing a lot of welding, just work on one section at a time, for example you would remove the front left hand side wing, then bag up the lights, wiring, wing mirror, hockey stick,, chrome, light mounts any screws and the wing bolts and washers and keep them safely together in a box. Label the box.
Then carry out welding repairs to that area BEFORE moving onto another part of the car. That way you keep the body shell straight as you are only weakening one area at a time. Don't cut all of the rusty panels off before starting welding repairs.
As for storage, you will need either a spare room or attic or a few sheds to keep all the bits from one car.
It might seem a lot of effort to do all the above but it saves a huge amount of wasted time and cost replacing lost parts when it comes to re-assembling the car.