I don't do this often using active accounts, but when I do, I transfer it all to ETS and move it via trades/gift/shop wiz maybe to 3 or 4 shells and let it rot for a month or so. Everything can be traced to a certain extent, but if you make it hard on them tnt may not care enough to see what you spent the np on.

Don't SS - from my experience, unless you're doing it VERY conservatively it's not worth the high risk if you don't want the account.