I would like to hear what principles different people use when making
Here is a the most fundamental of mine:
1. Start simple, stay simple.
It cannot be said enough. Less is more much more, and there is a
very good explanation that it pays to understand.
If you do less you can measure more. If you can measure more you can
better experiment with what works.
Most products are simple, based on simple insights. Make sure that
you stay true to that idea as you develop until you know you have
done everything possible to test it.