VERY good rules!
I try to shoot in 100 ISO. However, you will be more likely to get blurry photos (a steady hand is needed). I, myself would never shoot above 400 if possible. And if so (night shots) I would use a tripod.
Even though I shoot in AV mode most of the time, once in a blue moon manual. I do not hesitate to shoot in Program or Auto mode if I really want to make sure I get good photos. I used my program mode on my DSLR about 75% yesterday at the Japanese Maturi yesterday.
Out of 125 photos, I liked maybe 5. (A lot of photographers feel this way, maybe 10% of their photos are print worthy, but they take 1000 photos a day... and keep like 100). None enough to print.
But thats just me. In the last 10 years of digital shooting, I never print my own photos, at least not for me. LOL.
I do not know what your camera is capable of, so I can't offer much help except a tripod is a MUST for night shots or low light situations, Program mode or trying out manual modes.
If you are wanting to try AV mode, use the Sunny F/16 rule:
Sunny 16 rule
From Wikipedia, the free encyclopedia
For the EP by Ben Folds, see Sunny 16 (EP)
In photography, the sunny 16 rule (or, less often, the "sunny f/16 rule") is a method to estimate correct daylight exposures without using a light meter.
The basic sunny 16 rule, applicable on a sunny day, is this:
* Set aperture to f/16 and shutter speed (reciprocal seconds) to ISO film speed.
For example, for ISO 100 film, choose shutter speed of 1/100 second (or 1/125 second)
The elaborated form of the sunny 16 rule for more general situations is:
1. Set the shutter speed to the setting nearest to the ISO film speed
2. Set the f-number according to the table below:
Aperture Lighting Conditions Shadow Detail
f/16 Sunny Distinct
f/11 Slight Overcast Soft around edges
f/8 Overcast Barely visible
f/5.6 Heavy Overcast No shadows
f/4 Sunset
[1]
For example, to shoot ISO 100 film in sunny conditions, set the shutter speed to 1/100 or 1/125 and the f-stop to f/16. With ISO 200 film, set the speed to 1/200 or 1/250. For ISO 400 film, 1/400 or 1/500. As with other light readings, the shutter speed can be changed, as long as the f-number is compensated. For example, 1/250th of a second at f/11 would be equivalent to 1/125th at f/16.
Good luck and I hope you share photos when you get back!
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1st "rule" - set the image size to Large-Fine. You never know which image will be the one you want to enlarge. If you really, really have a limited amount of memory card space Medium-Fine may have to do but the loss of image quality may be a problem.
2nd "rule" - set Digital Zoom to "Off". Digital Zoom will only make your images look worse and can really ruin them.
3rd "rule" - leave the camera in "Auto" if you are not good with the various settings. "Auto" is fine for most situations.
4th "rule" - use some sort of camera support whenever you can (tree, pole, trashcan, etc.). Small cameras are very easy to shake when you press the shutter button and a lot of images are blurred that way.
5th and most important "rule" - take plenty of photos. I have never (well hardly ever) come home and thought "wow, I took too many".
And have fun!
boB