Concentrate on the Right Colours
So, now you have reduced the number of subjects in your pictures.
They still may look “noisy” or irritating.
One thing to bear in mind is composition - there should be a relationship between everything in the image.
The second main issue is about colours (or colors as you’d write in the US).
Again, less may be more.
Concentrating on just one thematic colour in different hues may result in fascinating shots. Such monochromatic pictures are relatively rare in today’s media and often get more attention than a brightly coloured shot.
more examples under Picking the Right Time of Day
Another option is to go for shots displaying a few strong primary colours.
Here again, it’s important that you select the right film - and “know” it.
the resulting picture may be very different from what your eye sees (there are people who still think photography is “objective” - no way!).
My personal favourite is Fuji Velvia (I take most pictures using this film), the main disadvantage being that it is a slow (50 ASA) material. There now is a 100 ASA Velvia, but it does not have quite the saturation and brilliance that the original has. A polarising filter may also be helpful.
So there are many different ways of consciously selecting the right colours. The main task is to “see” the photo before you take it. Admittedly, this is much easier with a good digital camera