Some people set up a strict goal of penning down a certain number of words daily. 1000, 2000 or even more!
Personally, I don't torture my brain with such goals....I also don't necessarily write daily....I can write and write best when I'm feeling completely full of words. At the same time, I am personally against the idea of hurrying down 10k words and then snipping it back to 2.5k.
Words have lives. They can move you, evoke a smile and make you do things you never wanted to do. So, editing is synonymous to cold-blooded murder, since you're killing/snipping words.
Of course, one can edit in order to insert better flow. But isn't it better that when you sit down and write for the first time, you do it so cautiously, so slowly, so guardedly that you write it perfectly, so that it doesn't necessitate any major editing?