Here's a little treat:
July midweek
SFO-SIN (via NRT or HKG)
wander around Singapore or the airport or nap in the Transit Hotel until dawn
SIN-NRT
stay a day or two or not
NRT-SFO
16904 qualifying miles plus bonus
(total 21130 for 2P, 33808 for 1P/1K)
$725, Q fare (non-upgradeable except with SWU)
The seat selections are sparse but it's a cheap way to visit Tokyo in high season and get yer miles in.
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"Blue days, all of them gone, nothin' but blue skies from now on"