To secure your spot in the gig economy, determine your rate, start marketing your services and pay attention to taxes, says freelancer Jessica Thiefels. "Network to meet other entrepreneurs, get help when you need it -- like a CPA or bookkeeper -- and take on great clients that are worth your time and energy," she writes.

Employees improve their chance of earning an increase in pay if they're adept at relating technical information to non-technical staff and step outside their role to troubleshoot organizational problems, writes Karla Reffold. Completing higher levels of certification related to their field is also worthy of a salary increase request.

LinkedIn is allowing users to upload documents and presentations, including PDFs and PowerPoint files, to personal profiles, writes David Cohen. The feature, available on desktop now and coming to the mobile app, was previously available only for messages and company pages.

Goldman Sachs has created an internship designed to boost diversity by hiring people with neurological differences, including autism, dyslexia and attention-deficit/hyperactivity disorder. The eight-week paid program features hands-on experience, mentoring and professional training.

You can confirm if a job offer from a recruiter is for real by reaching out to the referrals mentioned and asking if they've heard of this person, writes Terri Dickerson. Poor grammar and spelling, requests for money and emails lacking employer-specific addresses are other signs of trouble.

Cover letters rise to the top of the pile when they mention a referral from within the company, other personal history you have with the employer or how this position would be your dream job, writes Debby Carreau, founder of Inspired HR. Cover letters are ineffective if you don't customize them to the position and simply reiterate what your resume says.

Slow down to be more productive by focusing on one task at a time and scheduling breaks every day to recharge and attack tasks with renewed energy, says Paul Gentile, senior director of product marketing at LogMeIn. Disengage before you hit a wall and work remotely to escape office stress if possible.

Even though Marvel Studios' highly anticipated film "Avengers: Endgame" doesn't premiere until April 26, pre-sale tickets became available Tuesday. Fans of the Marvel movies ended up breaking online seller Fandango's record for tickets sold on the first day in six hours, and movie theater company AMC's website and mobile app crashed after tickets became available.