I believe that kettlebells and bodyweight exercises tainted with a bit of heavy odd-object lifting is all you need to get into and stay in peak physical conditioning.
The site
http://www.dragondoor.com/ has the highest quality kettlebells available, in my opinion. They also have great instructional recources as well (specifically "Enter The Kettlebell" by Pavel Tsatsouline).
For bodyweight training, there are a few really good resources. "Never Gymless" by Ross Enamait is a fantastic book. "Combat Conditioning" by Matt Furey and "Naked Warrior" by Pavel Tsatsouline are also great resources. I haven't read "Convict Conditioning" yet by Paul Wade, but intend to soon.
Heavy odd-object lifting is a somewhat forgotten training method that has been proven to give fantastic results in terms of massive all-around strength. Odd-objects are basically anything that isn't perfectly symmetrical and balanced, such as large stones, sandbags, barrels, logs, etc. There's a fantastic book detailing this and more called "Dinosaur Training" by Brooks Kubik. It is all about "old-fashioned" strength training (no machines, no ipods, no mirrors, no AC, no steroids). "Rock Iron Steel" by Steve Justa is a great resource as well.
All these can be found on 3 websites, namely
http://www.rosstraining.com ("Never Gymless"),
http://www.dragondoor.com, and
http://www.oldtimestrongman.com/books_and_courses.html. The latter is owned by John Wood, who is a great guy and has a fantastic e-newsletter available for free on his site. He also owns
http://www.functionalhandstrength.com, which is where I found out about Captain of Crush Grippers for the first time. I have one in my bag at all times, and train heavy with them 2-3 times a week. I can currently close the #2 gripper 22 times... I have a ways to go yet before closing the #3, though.
Anyway, I hope you find this information useful. It took quite a number of years to find it all. I consider the above resources the cream of the crop when it comes to functional (not about looks!) physical fitness. Use it well, make it a lifestyle, and
train hard!
- Phil