Hey there again!

I'm reading the wiki book about induction of lucid dreams

(http://en.wikibooks.org/wiki/Lucid_D...ion_Techniques)

Anyway, it says under the Hypnagogic Imagery section:

Try not to think about anything for more than a second or two by constantly switching your attention.[/b]
Think about.. what? Eggs?

Seriously, I don't know what I'm meant to be thinking about at all! Is it past dreams? People? Absolutely anything? Or is it something related to something that I've been doing..?

Thanks