HANDOUT:

Can of 7Up Soda Pop - "Giving you 7-up Lifting Thoughts".  Attach to 7 cards with your favorite seven thoughts or statements. 
Rubber band (large enough to fit on wrist):  When bad thoughts enter your mind, all you have to do is flick the rubber band.  That little sting can be an instant reminder.

LESSON HELPS:

Worthy Thoughts

NEW ERA POSTERS:

Lift your thoughts

OBJECT LESSONS:

Show a seed or a package of seeds and a fruit or vegetable (or a picture of one) of a different variety. Ask  if the seed could produce that particular fruit or vegetable. Emphasize that seeds only produce their own kind. Read 3 Nephi 14:16–18. Explain that the thoughts we plant in our minds produce the words we say and the things we do. (Idea taken from “Lesson 30: King David and Bathsheba,” Primary 6: Old Testament, 1996, p. 131.)

POEMS:

Your Mind's Garden by Elisabeth B. Waddell 

QUOTES:

One Liners
Quick Quotes
 

STORIES:
 

The Banana and Monkey Story by President Kimball (can be related to controlling your thoughts)

Try something different by Price Pritchett

VIDEOS:

Controlling your thoughts by Boyd K. Packer