I'm not sure this is realistic, but I'll give it a go.
Currently we're set for the following:
403 18,000
457 10,000
401 5,000
TACK 3,000 (estimate; depends on company profits at end of year)
Roth 5,500
Roth 5,500
Treasury Bonds 1,000
Total: 48,000
If mortgage principal counts, then that's about another 12,000.
Total: 60,000
We don't make much over $100,000 gross, so actually hitting $100,000 would probably take starvation levels of asceticism, but I can use this as a challenge to get as close as possible.
I will try to make the following increases:
$1,000 more to 457
$1,000 more to 401
$1,000 more to bonds
If I can reach those goals, I'll add to my challenge.