Great article with many excellent points, especially those about unblocking/blocking - essentially the two main activities you'll participate in to keep a project moving forward. Everything else exists just to serve these two goals, in my opinion.

I'd also add that a great tool that a tech lead can direct is post-mortems (corrections of errors, whatever your company calls them). Effectively leading these discussions improves a company culture, educates individuals both involved and those not involved in sometimes obscure errors, and elevates the team's overall experience level.

Thanks for the write up.