Howcast -Learn how to introduce a new cat to your cat from board-certified veterinary behaviorist Dr. E'Lise Christensen, DVM in this Howcast video.

Howcast -Learn if it is safe to let your cat go outside from board-certified veterinary behaviorist Dr. E'Lise Christensen, DVM in this Howcast video.

Howcast -Learn about the four c's of diamonds -- cut, clarity, color and carat size -- from private jeweler Kate Hemphill in this Howcast video.

Howcast -Learn about magician Michael Patrick, one of Howcast's card flourishes experts, in this video.

Howcast -Learn how to use pentatonic scale patterns in this Howcast video for beginner guitar players.

Howcast -Learn how to write numbers correctly from Gotham Writers' Workshop instructor Stephanie Paterik in this Howcast grammar video.

Howcast -Learn how to use "affect" vs. "effect" from Gotham Writers' Workshop instructor Stephanie Paterik in this Howcast grammar video.

Howcast -Learn when to use "between" vs. "among" from Gotham Writers' Workshop instructor Stephanie Paterik in this Howcast grammar video.

Howcast -Learn when to use "then" versus "than" from Gotham Writers' Workshop instructor Stephanie Paterik in this Howcast grammar video.

Howcast - Learn how to use your phone as a camera from professional photographer Luke Ballard in this Howcast video.

Howcast - Pick up three tips for picking a wedding photography background from professional photographer Luke Ballard in this Howcast video.

Howcast - Learn why it's important for parents of a child with autism to take care of themselves from pediatrician Asma J. Sadiq, M.D. in this Howcast video.

Howcast - Learn about the sexual feelings girls experience during puberty, and whether masturbation is normal, from Jennifer Wider, M.D. in this Howcast video.

Howcast - Learn how to teach your dog using clicker training in this Howcast video with Andrea Arden Dog Training.

Howcast - Learn about Airsoft CQB in this Howcast video featuring airsoft experts Payton Kemper and Josh Meyer.

Howcast - Learn how to do pretty prom makeup from professional makeup artist Michelle Dittrich in this Howcast lips tutorial.

Howcast - Learn how to deal with a child who is toilet trained at home but won't use the potty at school or daycare in this Howcast video featuring potty training specialist Ashley Hickey.

Howcast - Learn how to travel with a child who is still toilet training in this Howcast video featuring potty training specialist Ashley Hickey.

Howcast - Learn how to do butterfly guard attacks from Team Radical MMA head coach Rene Dreifuss in this Howcast MMA video.

Howcast - Learn how to play the single ratamacue from drum teacher Jason Gianni in this Howcast drum video.

Can't remember names, dates — or even why you walked into a room? Luckily, there are lots of things you can do to increase your memory power.

The only thing worse than forgetting someone's name is calling them by the wrong one. Learn how to lock people's names into your brain with these tricks.

So, it's April 15th and you haven't filed your taxes yet. Don't worry—we're gonna skip the lecture and get right to the solution.

How can we put this in a way you'll understand? Sending LOLs to your BFFs on company time is not KEWL.