I would also advise you to purchase some of the fundamental manuals, the ones for financials, inventory, sales, purchases. As you go through the exercises, debug some of the processes (debug a sales invoice posting for instance, or a quote to order process), so you get a feel for how things are done in NAV. Take note of variable naming and what type of code is in what type of object (for instance no data processing on forms, but function calls in other objects). By the time you ‘master’ the basics, you should have a pretty good ‘feel’ for NAV, and figuring out things gets easier from there. I’m not very strong in any functional area, but with the help of the consultants I work with I always figure out what to do.