In addition to maxing out DH's 401K (I don't have one) and doing a Roth for him and an IRA for me, we currently have an aggressive goal of investing $50K per year in our taxable account. This is new for us, however. We've only been contributing to the taxable account for since 2006 and didn't start aggressively contributing until 2007. We are 40 and 44, hoping to FIRE or semi-retire in 5 years or so.
When we were in our 20's all we could afford was DH's 401K. We didn't start Roth's until around 2002. Wish we could have been more aggressive earlier but grad school kind of interfered with our ability to save money at that time.
less stuff, more time
(48, married; DH 52. I am fully retired as of 2015 (well ok, I still work part-time but only because I love the job and have complete freedom to call off if I want to travel with hubby for work), DH will fully retire 2018 when he turns 55 to access 401K penalty-free)