Creating a successful video blog is part science, part art, and part luck. Here are three vlogs by entrepreneurs who get it right.

Wine Library TV
Fast-talking business guru Gary Vaynerchuk started this vlog to create buzz for his family's wine business. On it, he riffs on subjects such as wine, marketing, and following your passions. Vaynerchuk, who went on to write Crush It!, a best-selling social media marketing book, now has a namesake vlog as well.

On this popular marketing vlog, Shama Kabani, founder and president of the Marketing Zen Group, dispenses pithy marketing tips and shares company news. The no-frills videos are filmed right at Kabani's desk.

Will It Blend?
This classic vlog, starring Blendtec founder Tom Dickson, helped turn a household appliance into an Internet sensation. On the vlog, Dickson attempts to pulverize various items, including golf balls and an iPad, using his blenders. Viewers can suggest items to blend on the website.