Ramping down savings rate is a challenge too.
H&R Block offers free product to those who bought TurboTax Basic or Deluxe.
You can add after-tax contributions and in-service distribution to your solo 401k if you get your own plan document. It costs less than you think.
You still have good access to your money before age 59-1/2 when you do the after-tax 401k or 403b rolled over to Roth IRA.
You can still take advantage of non-Roth after-tax 401k or 403b contributions even if it will make your paycheck very small.
A step-by-step tutorial for how to do a backdoor Roth IRA, including links to articles on how to report it on the tax return.
Even if your plan does not allow in-service distributions, chances are you should still make non-Roth after-tax contributions. Just wait until you change jobs and roll them into a Roth IRA.
My interview on mint.com.
If your 401k/403b plan cooperates, you can put up to additional $35,000 per year into your Roth IRA. Find out if you are lucky or not.