Crafting can be complicated and difficult to manage in a campaign. By far the best way to handle crafting is to have a good crafting page on your wiki.
A good crafting page will have the following four items:
1: A table of craftable items
2: A Basic description of how crafting works*
3: A Log of how much time crafting time passed during each session, and the level at which that session was played
4: A Table logging what items were made when. The Table should have: Session Number, Item Requested, Materials Cost, Craft DC, Skill Bonus, Time Devoted, Die Rolls with Bonus, And Result in Percentage and Result.
5: A Fancy Crafting Calculator like this one.
* To determine how much time and money it takes to make an item, follow these steps.