I am planning a year-long journey beginning next year - sort of a celebration of mid-life, reaching my early retirement milestone, and venturing into business on my own (which will not happen until I get back, obviously!).

I currently have plans to visit, in no particular order:
Cambodia
S. Korea
China
Vietnam
Thailand
Indonesia
Australia
India
S. Africa
Tanzania
Kenya
Dubai
Greece
Turkey
Egypt
Croatia
Morocco
Ethiopia

And a bunch of EU/Shengen zones.

This will be my first visit to most of these places. Anyone know of a good resource that can me help acquire visas? I do not have the time right now unfortunately to run around to all the consulates, do it on my own, etc. My first outbound flight is April 17 to Singapore, so I have some time although there are other int'l trips before then for which I will need my passport.

Also interested in specific travel advice for these places - that which MUST be done or avoided. I am a professional photographer by trade so ideas for what might make interesting photographic subjects/areas is what I am after.

Help?