here we go again

all dressed up and nowhere to go

Elaborately attired or otherwise fully prepared for an anticipated situation or activity which, nevertheless, fails to occur.

all systems go

Everything is ready.

as you go

While one is doing (something); as one progresses.

boldly go where no man has gone before

To break new ground.

come again

A polite formula used when one has not heard or understood what has been said, or to indicate surprise.

come and go

To repeatedly appear and disappear; to be transient.

don't go there

Do not broach that topic.

easy come, easy go

Easily won and easily lost (usually said when resigned to a loss; something that comes in the same way, goes in the same way)