ちょっと一杯[chottoippai] let's have a quick drink
ばつ一[batsuichi] being once divorced
一向[hitaburu] nothing but
サラダ一皿[saradahitosara] plate of salad

安全第一[anzendaiichi] safety first
一か八か[ichikabachika] sink or swim
一っ走り[hitoppashiri] spin (as in 'take a car for a spin')
一つ一つ[hitotsuhitotsu] one-by-one

テロ対策[terotaisaku] anti-terrorist
マーケティング策略[maaketingusakuryaku] marketing tactic
リストラ策[risutorasaku] restructuring scheme
悪策[akusaku] poor policy
安全対策[anzentaisaku] safety measure

一策[issaku] idea
下策[gesaku] poor plan
劃策[kakusaku] plan
解決策[kaiketsusaku] solution
奇策[kisaku] clever scheme