What are the key tips for starting an IT company according to Thomas Preston-Werner?

According to GitHub co-founder Thomas Preston-Werner, the first essential tip is to start something—anything—and keep trying multiple ideas. As he notes, 'The best way to have a good idea is to have a lot of ideas,' because success rarely comes from your first attempt. GitHub was his '17,000th idea' after many failures. Second, be very careful about building your team, as most companies fail due to team issues rather than product problems. Start with co-founders rather than employees to create equal partnerships and shared commitment. Finally, build something people actually want—no amount of marketing can trick people into using a product they don't need.