According to the latest issue of Cosmopolitan Style there are 8 must haves for the season. Below are what I found online while sticking to that list, so you can get them all here. Most are budget friendly as well!
1. Prep-School Blazer
2. Something Strapless

4. Cocoon Coat
Okay, this one is pretty extreme and a major splurge. But doesn't it look so comfy?
Find it at Team Sugar - priced at $875.00 right now.
5. Color Blocking

Neiman Marcus - Was $140, Now $42
6. High Waisted Trousers
These aren't as high waisted as they've been showing for fall, but they do fit in with the meanswear theme. They're a nice basic.
7. Textured Knit
This piece will be great with textured leggings or tights. It would look great with knee high boots too! It's very versatile as it can be worn as top or dress!
Victoria's Secret - $68
8. A Skinny Dress

Victoria's Secret - $42!
Well thanks for reading & I hope you have a great fall - fashion & otherwise!