ok im getting board sop ima try and make a tutorial for you guys
SIMPLE BLAST EFFECT:

1.Open a new document.Any size will work for this tutorial.I am going to use a size of 300x300px
2.Set your colors back to their default settings by pressing "d".
3.Now go to Filter>Render>Clouds
(your image should look something like this)

4.Now Filter>Render>Difference Clouds.
(your image should look something like this)

5.Now Image>Adjustments>Auto Levels.
(should Look something like this)

you should remember these first five steps.Alot of good graphics start of with those first five steps.
Now we are going to give it the blast effect.
6.Filter>Pixelate>Mezzotint
use the "Fine Dots" setting
(should look something like this)

7.Finally Filter>Blur>Radial Blur
use these settings:

(Should look something like this)

ans there is your basic blast effect.now you want to know how to add some color right.There are two ways it can be done.
1.Layer>New Layer.Set layer Mode to color>then fill that layer with any color of your choice.

2.Image>Adjustments>Hue/Saturation

Here's my final result after i tweaked it with some other filters.hope you like this tutorial.