Here is sageouse's WILD

Anchor:

It's something, that will keep your mind occupied, so you don't fall asleep into unconsious sleep. It will also keep you connected (anchored) to waking life, so you remember what you doing. It's easy to lose track of the fact that you are WILDing.

Most common mantras are

1. Phrase
This can be anything, that will remind you of what you doing. Short or long, it's up to you. It should sound good, feel good and have special meaning to you personally.
"I'm dreaming"
"Next time I'm dreaming, I look at my hands and realize I'm dreaming"
are just 2 examples

2. Counting
Count from 1 up
or from 100 down

If you lose your place, no worries, just start over or pick any number.