Wrong: I shall walk a little piece with you.
Right: I shall walk a little way with you.

Place. Do not use place after any, every, no, etc., in the sense of anywhere, everywhere, nowhere, etc.

Wrong: I can not find it any place.
Right: I can not find it anywhere.

Plenty. Do not use plenty as an adjective or an adverb.

Wrong: Money is plenty. He is plenty able to do it.
Right: Money is plentiful. He is quite able to do it.

Poorly. Do not use poorly for ill or bad.

Wrong: He feels very poorly.

Principle, principal. Do not confuse principle and principal. Principle means a rule or truth. Principal means leader, chief, the most important.

Propose. Do not use propose in the sense of intend.

Wrong: I propose to tell all I know.
Right: I intend to tell all I know.