In increasing order of importance from top to bottom (in my opinion). You should at LEAST have the essential stack! Feel free to invest into the rest or even a thermogenic stimulant fat-burner supplement, but only do so if you plan on being on top of your diet otherwise you are wasting your money! If you do plan on taking another stimulant-based fat-burner, either omit your pre-workout drink if it is caffeinated or incorporates other stimulants.
The Essential Stack - An active multivitamin, fish oil, and a whey protein
The Intermediate Stack - (Everything from the essential stack) plus a branch-chain amino acids supplement, creatine monohydrate, and a pre-workout energy drink
The Advanced Stack - (Everything from the Intermediate stack) plus CLA (conjugated linoleic acid), R-ALA (r-alpha lipoid acoid), ALCAR (acetyl l-carnitine), and a great tea extract.

PLEASE PLEASE PLEASE consult your physician before trying any new supplements, diet programs, or training protocols. I also recommend brushing up on your research before hand. 

In increasing order of importance from top to bottom (in my opinion). You should at LEAST have the essential stack! Feel free to invest into the rest or even a thermogenic stimulant fat-burner supplement, but only do so if you plan on being on top of your diet otherwise you are wasting your money! If you do plan on taking another stimulant-based fat-burner, either omit your pre-workout drink if it is caffeinated or incorporates other stimulants.

The Essential Stack - An active multivitamin, fish oil, and a whey protein

The Intermediate Stack - (Everything from the essential stack) plus a branch-chain amino acids supplement, creatine monohydrate, and a pre-workout energy drink

The Advanced Stack - (Everything from the Intermediate stack) plus CLA (conjugated linoleic acid), R-ALA (r-alpha lipoid acoid), ALCAR (acetyl l-carnitine), and a great tea extract.

PLEASE PLEASE PLEASE consult your physician before trying any new supplements, diet programs, or training protocols. I also recommend brushing up on your research before hand.