From Thoughtworks

There isn’t an obvious “Hello World” for coaching or time management or influencing or persuading or articulating business value.

And

…there are two main activities in the team: those that directly produce value, and those that work to maximize the impact of what is produced.

And

When someone moves from techie to tech lead, they’re shifting from being one of the producers to being part of the team whose goal is to maximize overall impact (which includes removing obstacles and blockers).

And

…there are other tools, such as mentoring and running code reviews as a team, which are far more effective in improving the code base over the longer term…