Do your due diligence, but here are the cliffnotes:

All stocks in the US: FSTVX, VTSAX

All bonds in the US: FTBFX, VBTLX

Step 1: Put {your_age}% in one of the bond funds, and the rest in the stock fund.

Step 2: Religiously invest a portion of your salary every month.

Step 3: Don't look at your savings more than once every quarter or so.

Step 3.5: Don't let your spending grow out of control as your career progresses and your salary grows.

Step 4: Retire a multi-millionaire in inflation adjusted dollars after 20-30 years or so.