I greatly enjoy the following analogy formula- "Life is like [completely random thing] because [one aspect of random thing} and [another aspect, totally unrelated to life]. The funny thing is, you pick anything in the room or outside or on your mind, any inanimate object, and analogize it to life. Pick a couple abstract qualities of this random thing, and in a way, life actually *is* like that :) For example-

"Life is like a shoe. It starts out fresh and new, no experience or contact with the world. Then you wear it day in and day out, become comfortable in it, until finally its worn out and ready to be discarded, but its fulfilled its purpose. In that shoe though you can still see the essence of the original and will always remember the memories forged while wearing it."

See I just made that up on the spot.

"Life is like my ring- shiny, round, and sits on my finger through thick and thin."

Okay so that one wasn't so good. But it makes you go "huh?" So its funny.

"Life is like my computer. Sometimes its quiet, sometimes its noisy, after it runs awhile it gets warm, and I love it with all my heart."

That one was kinda humorous.