Each

"Each" is grammatically singular. It represents multiple items, but one at a time.

You can argue the logic of it, but until the rule changes, don't say "Each of them want to do a good job."   Each . . . wants . . .

The same applies to "either" and "neither." They are grammatically singular too. Also "everybody," "everyone," "nobody," and "no one."

Sink, sank, sunk

I sink (present), I sank (past), I have sunk (present perfect).

Don't, as someone did on the news today, say "The navy sunk the pirate ship."   They sank the ship.

Similarly, "Honey, I shrunk the kids" is grammatically incorrect. It should be "shrank" or "I've shrunk."

Uncharted waters

I saw a Chevron ad the other day in which they talked about searching for oil in unchartered waters. 

Of course they meant uncharted waters.

Charter (vt): establish or convey by charter; certify (Brit)

Chart (vt): make a map of

Adverse

Today on a list I follow, someone said, "I am not adverse to that."

That should be "averse."  

Averse: against

Adverse: harmful

Disinterested

I often hear people say that they are disinterested in something when they mean that they find it boring. Technically, this is correct, but careful writers and speakers try to maintain the following distinction:

Disinterested in: impartial in the matter of

Uninterested in: not curious about

For example, jurors should be disinterested in -- but not uninterested in -- the outcome of the trial.