1Design the inspiration board. Plan out the additions to the board before making the board. This includes positioning of elements, colors, layout and ability to make changes. Decide what sort of board you want physically - cardboard, hardboard, pin board, etc.
Focus as much as possible on visual markers, such as images, arrows, bright colors, exclamation marks, etc.
Don't plan to make it too wordy - a few inspirational affirmations are great but not blocks of text which will detract from the messaging.
Use bright, eye-catching colors.