Based on your fund options (fantastic for a 401k, btw), and what you've said is a desirable asset allocation, you have a few options. I would do something like one of these...
Easy Portfolio
60% - Vanguard Total Stock Market Index Fund
30% - Vanguard Total Bond Market Index Fund
10% - Vanguard Total Intl. Stock Index Fund
Super Easy Portfolio
70% - Vanguard Total Stock Market Index Fund
30% - Vanguard Total Bond Market Index Fund
Slightly More Risky Portfolio
60% - Vanguard Total Stock Market Index Fund
30% - Vanguard Total Bond Market Index Fund
10% - Vanguard REIT Index Fund
Contribute as much as you can to your 401k. At the very least get all of the matching (free money!), try to max it out if you can. Rebalance every six months to a year. Enjoy watching your stash grow, don't panic if it goes down, just keep at it. I'm jealous of your options, the only index fund in my 401k is the total stock market, so I put 100% into that. Some people around here have even worse 401k plans.