[TheAlchemist]

Sure, some of the most important ones are below:

- ideas are worthless without execution

- focus on the product - doing anything else before having at least an mvp is dumb

- focus on one thing at a time

- never lie to yourself

- we usually hugely overestimate what we can achieve in a short period of time, but also hugely underestimate what we can do in a long one

- being in good shape greatly improve my mood and performance at work

- don't mistake activity for achievement

And some more. Of course most of this stuff is obvious and I have always thought I knew them. This was in theory - this year I have 'learned' them the hard way.