I would:
1. Pay off all my bills, and my family's bills.
2. Quit my job and buy some forest locally. Build a cabin by a lake on said property.
3. Open a restaurant. Containing 5000 gallons of saltwater.
4. Buy some old growth forest on the coast.
5. Buy some not so old growth forest on the other (east) coast. Don't worry, it will be old growth eventually...
6. Buy some undisturbed grassland on the prairies. Well, sorta undisturbed.
7. Buy some forest in ON or QC. The Carolinian kind, I think.
8. Proclaim them all my personal eco-paradises and leave them be. Well, except for some research projects, probably some replanting of natives and management of foreign species, that sort of thing. Eventually culminating in small eco-tourism mini-resorts.
Hmm now that I think about I'd probably stop at number 4 and be happy.
