Yeah, this is an old ccoversation, but its interesting to think about!
1. Emergency Fund - having ready cash makes me feel much more financially secure, so this is key for me, both in terms of planning and peace of mind (and bank bonuses!)
2. Contribute to get 401k match - as
@amalone1013 said, free money!
2. Pay down CC Debt - yes, things on fire. We did used to live on the float, pre YNAB, so although we paid off in full and didn't incur interest, we were spending ahead of our income - not great.
3. Max 401k/HSA/ - lowering taxable income = instant return of something like 20% for us, in addition to this being our main form of savings (set it up, forget it exists)
4. Pay Ahead on Student Loans - we didn't have much in the way of student loans, but we got through them asap because the interest rates were higher than anything we could get on savings.
5. Pay ahead on auto loan - purely psychological for DH's benefit. He hates owing anything on a car just because he does, so even though the interest rate was super low, he just wanted it gone.
6. Super secure investments - CD ladder, relatively short term for anticipated college expenses
7. Market investments - cash outside 401ks that doesn't have a near-term need associated with it.
8. Pay off mortgage - really low priority for me. We have a good rate on our mortgage, and I expect inflation at some point, so having some low-interest debt might be a good thing in the next 10-15 years. Also, its a duplex, so part of our mortgage is related to our rental property and we can deduct that from the rental income, so it will continue to benefit us from a tax perspective, even if we don't wind up itemizing deductions on our personal return because of tax reform.