After casting your circle:
Light a pink candle and light some appropriate incense (you can look up associations for scents on the web) and sit and meditate or think on filling up with the emotion you'd like, or just let yourself drift off thinking of those things that do make you happy, then depending on what you'd like to use it for, either holding it in or projecting it out.
You could create a line or two of something to chant or request, but really it's all about intent and will.
All the objects scents and colours and herbs help make it seem more visceral, give you focus and all have their own energies that pile onto your own. But brick dust is just brick dust unless both you and the brick dust know its secrets and believe in the brick dust...so to speak. The brick dust won't work for you unless you want it to.
Just like people. People won't necessarily help you unless you want them to and know they are there for that and ask them to help you, right?
anyway I ramble....oh and pink is just the first colour I thought of, white would work just as well.
