How to become a profitable scrapper?

I have been scrapping less than a year, but I'm doing well so here's my advice:

1. Although we collectively call ourselves and each other scrappers, for the sake of marketing always refer to what you do as recycling. "Scrapper" to those who know little about what we do evokes images of dumpster diving scroungers who may skirt the law and are probably less than ethical. "Recycler" evokes images of the new "green" trend.
2. Bankroll some money for expenditures over and above gas, tools, etc. Usually my most profitable trips to the yard are with a truckload of scrap that I purchased. Yesterday I shelled out $265 bucks for cast iron steam radiators, the ancient boiler (which was cut into six pieces) that ran them, assorted pipe (complete with about 40lbs of brass and 60lbs of lead), a broken A/C unit, a water heater and a fuel oil tank. When all is said and done I'll collect about $850 from my $265 investment.
3. Brainstorm CONSTANTLY about how you can obtain scrap. For instance a few days ago I had the idea to approach non-profit groups about doing a "scrap metal drive". They do all they legwork to inform people and solicit donations of scrap metal. They'll schedule a time and place to have all of the donors drop their scrap off at a central location. Volunteers can help me clean and separate the metal, then we turn it in and split the cash. Will this idea work? Who knows, but I'm gonna try it.
4. Remind EVERYONE about what you do. You want everyone you know to pause before they throw the old microwave or dryer in the trash and go, "Oh yeah, I'll give this to "______", he'll recycle it.
5. Never ever assume anything... Never assume a dumpster is empty, never assume that the answer will be "no". Last week I saw a mattress store doing a "going out of business sale". This store has giant lighted aluminum signage attached to the building. I estimate the signage will bring $600 in scrap aluminum. I went inside, gave the salesman my card and offered to take the signage down for them in addition to paying $100 for the signs. Today I got a call - he started by saying that the home office wanted someone bonded/insured to take down the sign.... BUT since I had offered cash for the sign, they would let me have it for the $100 after the sign company takes it down.
6. Get off the Craigslist train. It's too crowded. I look for stuff constantly on CL, but I don't advertise there.
7. Watch for local auctions, both live and online. Two weeks ago I bought 800 giant aluminum cable fittings for $71. They scrapped out at $138. Most scrappers probably passed this by because they didn't list a weight. I did about 15 of research, found the exact fittings online and calculated their value from the weight listed on their specs.
8. Keep notes or a journal of everything you find, when you found it, etc. I do this and refer to it often just to remind me of the potential scrap hotspots I need to revisit.
9. Whenever you get some scrap from someone, always ask if they have anything else and list the items you can take. You will almost always get something else, many times you'll get much more than the original item(s).
10. The less greedy you are, the more you'll get! The other day I had some perfectly good bed frames... I stopped by a Thrift Store that I pass every day and asked if they could use them to sell. They said they sell them faster than they can get them in. So now I give them any bedframes I find, and they now have a bin inside their back door where they now save all scrap for me rather than throwing it in the dumpster.
11. Most importantly, always be courteous, honest and ethical.