Get your product in front of actual, living, breathing strangers. Your college roommate's approval does not mean there's market demand.

The best cover letters I've read are from people who have a passion for my company, and can make that passion come to life on a page. The letters that make me say, 'Yes! This person really gets it.' Because, at the end of the day, I want to hire people who already get it. Most hiring managers do.

Launching a start-up, you need to get a lot done quickly. Every day is different. Everyone pitches in with everything. It's easy for the founding team to say, 'We're flexible. We all help out with everything!' But when it comes to making decisions - that flexibility can spell inefficiency and disaster.

Most weeks, I work 100-plus hours on TheMuse.com. There are definitions of 'work-life balance' that would say I have none.

Even your most talented employees have room for growth in some area, and you're doing your employee a disservice if the sum of your review is: 'You're great!' No matter how talented the employee, think of ways he could grow towards the position he might want to hold two, five, or 10 years down the line.

I've learned I'm rarely able to stay at home and not work. If I try to 'just sit on my couch for a little while,' I am going to grab my laptop and just knock out a few more emails, or start sketching up some product ideas for TheMuse.com. So when I want time off, I schedule dinners out, movie outings, and on occasion a flight lesson from Groupon.

As we've grown 'The Daily Muse' and met contacts who want to collaborate with us, knowing who does what has helped us be clear on who we want our partners to connect with - and makes us look buttoned up, too. SEO firm? Talk to our COO. An editor from the 'Huffington Post?' Meet our Editor-in-Chief.