Ok, once you ordered your loop cd and you got the idea for your song, you are still alone in front of that mountain. No matter if it is electronic dance stuff or a complicated composition. It has to sound right and you need the right loops.
I saw some complaints from users, that "the sounds are great, but the loop I am looking for is not on the disc"... Well, good that we are here, so you can just buy the loop you need and not the whole CD
The "school of podcasting" has a description of his weekend online, trying to get something going with loops:
Article of a weekend with sounds...