My work provides a 457b, as well as 401k. There are good Vanguard options in the portfolio - I'm split 35/35/30 between VIIIX, VMCIX and VSCIX. There is a 457 Roth option, but I'm in the traditional 457.
For 2020, the max contribution is $19,500. Work matches 2% of what I put in; so I must contribute 98% = $19,110. I started the year planning to hit this amount, split evenly between 27 bi-weekly pay periods (normally 26, there's an extra one this year), by paying $707.77/paycheck. As of 3/1/2020, I changed my strategy to hit the max contribution by mid-June, by contributing $2150 for 7 pay periods, then rounding the last one to hit it exact.
I figure it's time IN the market, plus some stocks on sale right now because of the corona virus. I have also been contemplating starting my own business, so this would front load my currently available retirement benefits. My wife has a solid job, I self-manage 3 rentals right now (we're living in our 2nd house hack), so we should be able to swing it just fine.
The HR lady about fell out of her chair when she saw the amount I elected to contribute. My take home pay until June will be very, very small. She joked if I'm planning to retire soon? I'm 35, she's about 60. I said yes, but it'll take a little more than $19.5 to get there! :-)