wow, that guy types like he has a ton of energy! Like he should be on an infomercial!
lol, neways. It definitely helps to have some "unique" looking pieces to really bring character to your tank. Hand picking up live rock helps for this. Another good thing to do is look for people breaking down their tanks. You can usually pick up some really nice live rock for $1-2/lb. I payed $200 for 50# liverock online when I first started and I'm not gonna lie, it was possibly the biggest waste of money of my entire build(it came in the mail ~90% dead, bleached ect.). Since then I have picked up some really REALLY nice pieces from people breaking down tanks locally, or an awesome looking piece I found at the LFS.
back on track... a good place to start when building ur aquascape is to find some good foundation pieces. You can either spread them out creating crevasses to swim through or not but make sure that they are sturdy! And build UP;or off from there.
I always situate my rocks a bit and wiggle them a bit, making sure they are secured in and not going to topple down. (You will be surprised how easily some rocks slide/shift on you that you thought were secure!) that becomes increasing in danger with the more corals you have in your tank >_<!