Its important to be able to constantly improve your work. It's no good saying "I don't like that it's not working" if you can't take the next step and assess what is wrong.
If you finish your art work and something is wrong, do not just bin it.
1. Look at it from a distance - we mostly paint too close to the paper and it's amazing what changes if we look from a distance, or in a mirror
2. Put a mat/frame around the painting - maybe it's not as bad as you think.
3. Crop the painting differently sometimes in a smaller painting the focal point changes
4. Try adding darks, your painting may just be missing tone 5 (in the foreground not the background)
5. Put it somewhere you can look at it for a couple of days to reflect
6. If it really is beyond repair use the back of the paper - you are guaranteed to get a masterpiece as psychologically your paper is now valueless and you probably find that you are painting in a much freer style!!!
Here is the painting we didn't like with a list of what we think should be improved
Large fir tree is
1. too big
2. too monotone
3. branches too horizontal
4. too uniform
5. too far to the left for the focal point
Composition has too many horizonal bands
mountains have only 2 tones
background tree is too large
Refections in lake(?) do not match background
Some lost and found edges would be nice
tone 4 is missing
some of the fir tree colour should also be in the background