Managing a windfall

[ShawnHoo]

Here's a financial planning scenario for you:

I was fortunate enough to have my employer go through a successful IPO this past summer. This has left me in an enviable, although unfamiliar, situation.

I've diversified somewhat, cashing out about $175K post-tax. I still have on the order of $125K post-tax remaining in vested stock, and I'm going to be vesting the remaining half of my grant for two more years. I've placed my cashout in a mix of Vanguard funds: 60% domestic equities, 20% intl equities, 10% bonds, 10% REITs.

I'm 27 y/o, single with no dependents, renter, and no debt other than a car payment that's at 3.65% fixed. I live well below my means in terms of income.

Am I on the right track with the Vanguard funds? Should I have cashed out more company stock at this point? Any other things I should/shouldn't do? This may very well be the biggest lump sum gain I experience in my lifetime, so I don't want to blow this.