I've read PG's essays, watched startup school videos, read countless books on startups and project management and creativity, and I still fail to invent something new/original/useful.
Any tips or advice would be very helpful!
I have also have already built a bunch of projects (you can check them out at https://rayalez.com), they have some traffic/users, but I ended up getting stuck and I have trouble finding a way to take them further than initial few hundred users. Which one of them do you think looks the most promising? What can I do to make it more successful and turn it into a business? What would you do in my place?