[nisoku-no-waraji-wo-haku]Literal translation:Put on two pairs of straw sandals/flip-flops Meaning:Have two jobs that are difficult to go together 

二足の草鞋を履く

[seni-harawa-kaerarenu]Literal translation:The belly cannot be replaced by the back.Meaning:To do something important, you have no choice but to sacrifice some other things. Etymology:During a duel of samurai warriors, the belly should be protected by sacrificing the back, to survive.

残り物には福がある