Good analogy for trading as a business

What separates the successful traders from the failed ones is the ability to see trading as a business.
"I'll never forget the saying of my second boss: Trading is a business like any other business. Learn to buy wholesale and sell retail. If they don't come for your inventory~ mark it down and move it out the door" (This is called taking a loss, by the way.)"
Linda Raschke, street smarts

A nice extension of this basic analogy has also been proposed by our very own Prem
"Prem's 10 simple tips like a shop

1)Trading in share mrkt is like opening a new shop.

2)Identify the product with good demand.

3)Buy the Products which has long shelf life(L&T,BHEL,BEL).

4)If there is a particular demand for the season like cements,textiles(Diwali &Holi season) buy&sell them in season.

5)Dont buy perishable items(penny stocks).

6)Maintain standards in shop for purchase & pricing.

7)As demand increases for ur product try to sell some qty at every rise(remember there is no MRP).

8)Do your homework on purchase and maintain good Accounts(essential for shop)

9)If there is a strike(correction),close your shop and stay at home, you can buy good products at a cheap price during the strike.

10)If u dont have enuf money buy it thru advance payments(F&O)....GUD LUCK FOR YOUR SHOP."

If you approach the market as a business you will succeed.
Here are my practical translations

Use sector Rs to figure out which sector is in demand

Use stock Rs to figure out which stock within the sector is most in demand

Buy stocks which meet a minimum quality in terms of traded volumes/trade capitalization per day

Fundamental Investing is about buying value or growth.
Trading is more about buying whats in demand :)
So my summary for now invest in sugar/cements/IT/capital goods/Auto parts/Pharma, trade in infra/realty.
Specific list of stocks which I consider worth trading in are listed in the previous post.