Taxable investment accounts (i.e. save on your own outside of tax-advantaged vehicles)
Exactly. If you qualify for a Roth IRA, that is probably going to recommended before a Traditional IRA. You can put up to $5,500 in this account for 2013 (and $5,000 for 2012 if you do it before April 15) if you are under 50.
Depending on your insurance plan, you may be eligible for a HSA (health savings account) which is another tax break and way to save for retirement. For 2012 the contribution limit was $3,100 for an individual.