Just registered, but been lurking for quite a while now.
When you have GPU capacity use it for example with multipool.us. There you get the most profitable coin for that moment (based on difficulty, price and such).
I myself have three GPU's running there, 1 in Worldcoin (as I see a bright future there with the whole foundation behind it pushing it for use with POS) and 2 on the most profitable option.
For now that's mostly Doge and Lottocoin (and sometimes WDC too), both I move through my wallet to Cryptsy (or Vircurex) and put up for sale about 10-20% higher than the market price. These regularly swing up and down 20% so you'll sell your coins at a better price than projected. About 30% I sell for just above marketprice to at the moment mainly BTC. When I have aquired a nice baseline there I'm probably converting them mostly to LTC.
This is exactly and precisely what I plan to do. I'm starting small and hope to do something like:
50% reinvest to hardware for 3 mos (+ add a small amount of my own money over that period)
30% save toward that 1 BTC to pay my mate
20% keep stock of selected currencies longer term
After I'm happy with the hardware I have (I'd like to push towards about 5-7 Mhash within say 6 months), I'll stop investing in rigs and increase the amount I am converting/saving.
I think the key here will be to keep up to date with market pricing, and be quick. For that reason I've build a number of widgets which stream to me from the machine I will use to monitor this from the major exchanges.
@Depthcharge - yep, the 6990 is the dual GPU. I know it's not great for hash/watt but I'm getting it quite cheaply second-hand and I'm using it with my existing components. At the moment that includes a 750W gold PSU, so I can't push it much further than a single 6990 without upgrading that too (I dunno if I would feel too good about 2 of them on this PSU). I had planned to start out quite alot bigger this month, but naturally Murphy's Law struck and my car blew up, so that's gotta take priority over a hobby for now.
As time goes on I'd hope to grab more efficient cards, and build better hash/watt rigs and then sell on the 6990. I should easily enough make a profit on it, I think. If I break even on it I am happy too.
I'll take any advice from any angle on how I can improve this plan, and thank you all for replies, feedback and advice so far!
Rit.