Since this is part 2, two is the keyword of this post.
1. Two third-party services for Gmail that have great potentials:
Toss the junk with one click.
If you want unsubscribe all those ads in your inbox, try this.
Fly through your email.
Turn your inbox into a to-do list.
Create and share custom maps.
Great for trip planning.
Discover exhibits and collections from museums and archives all around the world.
3. Two of my favorite YouTube channels:
Complex things explained.
Breaking news on a weekly basis.
Hosted by John Oliver.
4. Two of my favorite Chrome extensions:
View definitions easily as you browse the web.
Look up the definition of a word by simply double clicking on it.
Automatic security, browse encrypted.
Enforce https when possible.