Sounds like you should learn some Illustrator as well for the type of geometric elements you seem to have in mind. What I like to do is create elements in Illustrator, then copy & paste them into Photoshop for assembly. That way you get an immediate reality check by rasterizing. Of course you save the Illustrator file with all it's elements so you can re-paste as needed. (Illustrator's typography works better than Photoshop's; and of course there is a much better set of drawing tools.)