Have you gone to lunch yet with a colleague who takes a moment to ‘check in’ at the restaurant on her iPhone before ordering? If you haven’t yet, you soon might. If you have, perhaps you think Foursquare is inert, pointless and somewhat geeky. Many called Twitter the same when it got going. Adele Jarrett-Kerr explores some of the basics of how to use Foursquare, an increasingly popular location-based social networking site.

Maybe your boss is away at a conference, you’re working remotely from home or multiple colleagues need to view those images, that presentation or, worse yet, that video. We conduct so much of our work digitally these days that we can’t avoid sending large files online. But sending large files can feel like watching paint dry. Put that USB-stick away as Adele Jarrett-Kerr talks you through some popular options.

Is your boss a PC or a Mac? If the latter, he or she will no doubt be aware of Apple’s latest product, the iPad.

Twitter … you either get it, or you don’t. Those who don’t tend to be sniffy about it. But the Labour party has appointed a “Twitter Tzarina”, Bristol East MP Kerry McCarthy, to improve the party’s use of social networking sites in the run-up to the next election. And Gordon and Sarah Brown recently pitched into a Twitter debate about the NHS, so they’re taking it pretty seriously in the corridors of power.