I also try to use everything I have accumulated and build realistically. My storage is primarily holiday and town decorations, along with other crap I'm not allowed to sell. The holiday decorations are scattered through town during the holiday (shamrock shrubs, valentines balloons, jack-o-lanterns, nutcrackers) and get put away when the holiday is over. I have holiday sections where a few of those decorations stay all year along with the holiday buildings. Town decorations & nature items are in storage usually due to remodeling so I don't have to repurchase them. I tap hard for every dollar and hate wasting money, even if I do have more than I can spend.
I'm still working to purchase all the land, so I do have a few building clusters that aren't pretty. I cluster them based on how I will design when I get the space. For example, I have a cluster for museums, outdoor things, foreign buildings, sci-fi buildings, etc. I just started spacing out and designing my education buildings and Halloween sections. I could probably space more out, but I can't bear to get rid of my house/KEM farms just yet.
Feel free to add me and take a look around! I have plenty of friend space.
Wrkingrl509