He admits to lifestyle creep as his income increased. It's not what you make, it's what you spend. That's the best personal finance advice I ever received, but very unintuitive for most people unfortunately.
But I have zero debt, no financial obligations, and $50k in the bank, so I'm doing fine. Just not what I would have expected after a year like 2013.
It's also a good idea to do the same thing for investment. Especially with the amount of taxes you're paying, being sure to take advantage of government tax-advantaged retirement plans is important. You make too much now to do a Roth IRA, but you can still do a traditional IRA. I'd recommend using Vanguard, investing in index funds, and again setting up automatic investments so that you don't have to think about it.
(This is the first time I've read your blog and I know nothing about you, so maybe I'm saying things you already know, but I thought it couldn't hurt to post anyway. As you mention, you're in great shape either way.)
I've heard this as "It's not what you make, it's what you save" which puts the emphasis on building wealth.