In addition to our Sunday App of the Week feature, we also summarize some of our favorite B2B sales & marketing posts from around the Web each week. We’ll miss a ton of great stuff, so if you found something you think is worth sharing please add it to the comments below.

In the meantime, here’s some of what we’re reading:

The deep, dark, emotional challenges of being a leader

Being a leader can almost mean that you have to jump over hurdles and deal with difficult tasks. How do CEOs deal with these struggles? Real life examples from real people. Thanks Brad Feld.

Why white papers still matter: their role in effective content marketing

You may think white papers are a thing of the past, however they are not dead. They can still be highly effective content marketing tactics. Thanks for the reminder Roanne Neuwirth.

Influencer marketing: avoid pitfalls and tap into deeper value

What do you think are key tactics of a strong marketing approach? Influencer marketing can be efficient, but don’t forget to dig deeper. Great tips Carmen Hill.

How responsive web design works [infographic]

Designing a cool website is great and all, but it’s the research it can give marketers is even more important. Are you making sure that your website is responsive on all platforms. Great insight Lindsay Kolowich.

9 reasons your emails get rejected

Have you been fighting with your emails these days? Check out these 9 great tips to why your emails are getting rejected. Thanks Jared Flamm!

Marketers regularly use over 100 software programs

To many, 100 software programs seems absurd. However, when you think of all of the programs that you use, then think of all of the programs that are connected to those, you just might be at 100 now. Interesting stuff Scott Brinker.

Listening and empathy: making your marketing more human-centered

According to research, some companies have been struggling with connecting with their customers and buyers. Don’t forget to be human! Great tips Tony Zambito.

Three campaigns that prove direct mail is still worth your time

Don’t you love receiving cards in the mail? Most people do. Direct mail is still an effective way to get in front of your busy business owners. Good stuff Lisa Fugere.

The difference between content marketing and inbound marketing (and why it matters)

Content marketing and inbound marketing are not the exact same, but definitely can coincide. What do you think the difference between the two is? Good comparison Joe Chernov.