Aging or "Cellaring" pipe tobacco is very simple. As Javajunkie has said the main thing you need are clean mason jars, lids and rings.
The following is the average amount of bulk you can get in each jar. A 1/2 Pint (8oz) will hold 2oz of tobacco, Pint jar (16oz) will hold 4oz of tobacco, a Quart jar (32oz) will hold 8 oz of tobacco, A Half Gallon jar (64 oz) will hold 1 pound. Your mileage will vary with how tightly our pack it in, cut of tobacco, etc.
Most people don't open and jar tinned tobacco, some do its personal preference. The big worry about tins is rust, as they age they will sometimes expand from the fermentation process that is happening.
As to what ages well....
Virginia based blends age very well, the Virgina's become more flavorful and sweeter over time.
English Blends age also age fairly well, but as they years go on the latakia will soften both aroma and intensity.
Aromatic Blends may or may not age well, I have no experience with aging them.