First you have to see if the criticism is constructive or destructive. If it is destructive eg. "Your idea sucks!". Well then just ignore it. You have to develo

First you have to see if the criticism is constructive or destructive. If it is destructive eg. "Your idea sucks!". Well then just ignore it. You have to develop a bit of a thick skin and ignore the naysayers and the ones who want to put you done. If the criticism is constructive then make sure you understand what needs to be done or how you can use it to your advantage. In my experience being a solo founder is very tough because you have to keep yourself motivated. Having a partner helps so that you can take turns at picking each other up when times get tough.