Don't count SS since it is a long way off. Do count the 529 since it is money I won't have to spend when the kids are in college (plan to graduate them debt free). Don't count the home equity since I plan to live in the house for a long time and would not tap the equity. Other than that, everything else will eventually be mine (Employee Stock Purchase Plan, Pension fund lump sum value, 401ks, HSA, bank accounts (with current exchange rates), etc. Don't count assets like cars and expensive items we have collected overseas, although we could probably sell these things for a nice chunk of money.
At one point I discounted some of the items for taxes and potential penalties, since I'll end up paying at some point, but it became too complicated. It's something I will just try to optimize. I look at it as an upside to early retirement, reducing the amount I need to convert from pre-tax to Roth.