That's called a http://en.wikipedia.org/wiki/Garden_path_sentence

no, i don't think it's a garden path sentence, because prior to the comma, it's just gibberish. a garden path sentence leads you down one path of meaning before turning the tables on you. it's quite possible that i'm being pedantic or just wrong, but i think the op's point stands: it's badly written copy and needs to be changed. it can't be justified as a poetic device.

Apostrophes around 'you' and 'fu' would do alot for clarity

Or bolding "you" and "fu."

Dashes are the cleanest and most portable solution to this problem.

Activate some you-time, fit in some fu-time.

Agreed - I like that. Thanks. That also solve the problem of not being able to use italic to highlight the "fu" in plain-text cases.

Activate some you time for great good!