The fall semester kicks off with our annual festival of innovation and entrepreneurship, t=0. But how does a budding entrepreneur kick off the spring semester in style?

MIT's Techfair 2013 is your answer. The student-run event has all the energy and enthusiasm you need to start the spring semester inspired.

The fair itself, on Monday, Feb. 4 from 10am to 3pm at Rockwell Cage, is part tech expo and part job fair. But the Techfair student club takes its mission to "promote knowledge of technology and of the tech industry" seriously by holding a series of tech events, including a weekend hackathon this Feb. 2-3, as well as a speaker series later in the week.

At the fair, you will see startups and established companies, including many MIT alumni-founded companies, as well as demos of 25 student startups or projects.

The student projects are heavy on hardware, from electric vehicles to 3D printer innovations, with web apps and social entrepreneurship also represented.

One student presenter, oneTesla, is demonstrating a "singing Tesla coil" that just raised $170,000 through a Kickstarter campaign. We profiled the students behind oneTesla in a recent video on this site.

Later in the week, on Friday, Feb. 8 in the evening, Techfair will host four speakers on the topic of "innovation in a data-driven world," including MIT alumnus and Meraki co-founder John Bicket, as well as Kayak co-founder Paul English. The talks are free and open to the public; register online to attend.

From a hackathon to tech talks, with innovative demos in between, you'll be ready to do cool things this semester.