Surfs Up - 490kb

Hi
I am new to posting but have been quietly observing forum activity and thoroughly enjoying browsing the many images posted here.
I'm a friend of Wendellt and new to photography. Wendell has been guiding me in the basic use of a camera and photography in general. I think there was a thread here discussing which camera I should buy, the Nikon D70s or Canon 20D, I obviously went with the status quo and bought the D70s with 300G lens.
These are some of my first shots that I am happy with, shot at Mona Vale beach on sunday 5th Nov.
The first 3 have been post processed to look the best they can for the purpose of sharing
full manual 1/1000 f5/6, ISO 200,
contrast enhanced in photoshop - auto levels
1/320 f9, ISO200, adjusted PP
1/1000 f5.6 ISO200, adjusted PP
1/1000 f5.6 ISO200, adjusted PP
Technically how can I improve the following. All shot with the 300G lens at 300mm. They look blurry to me can I be doing something to improve the definition and contrast of these shots, should I use a monopod, hold the camera a better way, try different exposure settings or work on my focus method?
How can I improve the contrast on this shot in the camera rather than in post processing?
Thnakyou
Catherine
D70S, 300G
I am new to posting but have been quietly observing forum activity and thoroughly enjoying browsing the many images posted here.
I'm a friend of Wendellt and new to photography. Wendell has been guiding me in the basic use of a camera and photography in general. I think there was a thread here discussing which camera I should buy, the Nikon D70s or Canon 20D, I obviously went with the status quo and bought the D70s with 300G lens.
These are some of my first shots that I am happy with, shot at Mona Vale beach on sunday 5th Nov.
The first 3 have been post processed to look the best they can for the purpose of sharing
full manual 1/1000 f5/6, ISO 200,
contrast enhanced in photoshop - auto levels

1/320 f9, ISO200, adjusted PP

1/1000 f5.6 ISO200, adjusted PP

1/1000 f5.6 ISO200, adjusted PP

Technically how can I improve the following. All shot with the 300G lens at 300mm. They look blurry to me can I be doing something to improve the definition and contrast of these shots, should I use a monopod, hold the camera a better way, try different exposure settings or work on my focus method?

How can I improve the contrast on this shot in the camera rather than in post processing?

Thnakyou
Catherine
D70S, 300G