We track in Quicken, which means the net worth includes whatever DH enters - basically, bank accounts, investments, home equity, and cars. But when I do RE math, I just look at actual investable money -- I figure we will always have cars, and we don't plan to sell the house, so it makes no sense to count those in that analysis.
Other stuff, like reimbursements, points/miles, etc. I just don't even think about.