Sophomore Slump or Comeback of the Year by foxxcub. Charlie/Sawyer. know. I KNOW! But this totally works even if you're not remotely into Charlie slash and is hot and hilarious and a very quick read. (NC-17)
Dissonance by themoononastick. Hurley has the cure for what ails Charlie now that they're back in the real world. Sweet and funny and a little sad at the same time.
Day 1514 by arabella_hope. Funny Halloween fic with Sawyer giving a very inappropriate treat to little Aaron.
And if you want good ol' fashioned non-canon specific Jack/Sawyer smut that will get you hot and bothered and then leave you with a lump in your throat, check out uberaeryn's Ray of Light.