How to decorate your home like a mature sophisticated adult.

So I arrived home from work today, opened the door to my apartment and was quite surprised to discover a fluffy black cat. Then I looked up and saw a table I'd never seen before. Looked around a bit more...where'd all this crap come from? It took a few seconds...yup I walked into the wrong apartment. Apparently I'm not entirely settled in yet.
I have a disturbing amount of stuff so I think getting unpacked and organized will take awhile. I've been trying to spend a bit of time each day making the new place feel like home. My method for decorating the apartment is: Buy old stuff from antique malls, Goodwill and Value Village. Also accept donations of second hand old stuff. Mix in with new stuff (such as picture frames, plant pots and plastic dinosaurs) from the dollar store. Paint, frame, hang and/or display stuff.
Ta-Dah!