wasn't sure if i shud post this here on not but its here now so...

I've written a few songs (i've never posted any because they all sucked)
i want to know how to go about writing powerful songs using the ideas in your head and you heart. Machine Heads is my favourite band right now not only because they are so heavy but because i can connect with the lyrics.
i was wondering if the UG community could give me pointers on how i could write about the ideas that ive got. right now im studying to get my english higher (scottish grading system just in case u dont understand) and i was thinking i may have to use techniques i have learned in that class like use of connotations and ,obviously, strong imagery.

all help greatly appreciated