Somehow I seem to be having an application on Facebook posting to my news stream information about me without ever remembering that I signed up for it. Disconcerting, to say the least! How do I check what apps I have authorized and delete ones I don't want from the Facebook universe?...

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I have a friend's e-mail address and I want to send them a file from my computer. How do I send it to them by e-mail?...

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I'm wondering what's the easiest way to connect to someone I've met at a conference when I get back to my office and want to use LinkedIn? Some folk seem to use Facebook, but I'm a recruiter and LinkedIn is my favorite. Tips? Suggestions?...

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I took some photos with my digital camera and I want to e-mail them to friends or upload them to my Facebook, but the files are enormous, and uploading them takes forever! Can I make them smaller while still having the photos look the same?...

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I read a set of instructions for Microsoft Windows XP that required me to "open a command prompt" before running/typing in some sort of command. How do I do that?...

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How does Facebook make money, Dave? I mean, seems like every time I log in there are new applications from third parties and more friends to connect with, but I never pay a nickel. In fact, the only place I've ever bumped into a request for payment is when I want to send someone a "gift", but that's all based on "facebook credits"? What's the scoop?...

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I read your note yesterday about how to update my Facebook account password (see: How to change your Facebook password) and want to change my Gmail password, but I can't figure it out: there's no way to do so within Gmail, as far as I can tell?...

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It's not that I'm paranoid, but I am worried that my roommate might have figured out my Facebook password and I want to change it ASAP. How do I change my Facebook password?...

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I've been reading all of your earlier articles about how to work with Apple's iPhoto (see iPhoto help) but what I haven't seen is a piece about how to publish photos from iPhoto directly onto Facebook with vast amounts of hassles. Is that doable? If so, how? Thanks, Dave!...

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I know you've written about how to create an "add me" button for MySpace, but, um, I'm not on MySpace, I'm on Facebook. is there some way to build or hack together an "add me" button for Facebook to add to my site instead? Thanks....

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I heard on the news today that my favorite social network, Twitter, is being plagued by what they called a "denial of service attack". What on Earth is that? They're forced to not actually get service and it's an attack? I mean, I've been to restaurants where I experience a denial of service, but how can something like that affect Twitter or Facebook or whatever?...

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I can see that there's a "Flickr" button on the bottom of the iPhoto pages in Apple's iPhoto program, but I have no idea how to use it. Can you step me through the process so I can learn how to publish my pictures on Flickr since I don't have Mobile Me?...

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I'm the Black Eyed Peas biggest fan and love all their work. I'd love to send them some email and tell them how great their songs are: how can I find an email address for the band or of Fergie, their amazing singer?...

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On my journey to find the ideal Google Gmail account ID, I ended up registering a few extra accounts (Gmail addresses? Not sure how to phrase that). Problem is, at this point I just want to axe the old addresses but can't for the life of me figure out how to do so. How on earth do you delete or cancel a Gmail account address?...

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Dave, I have heard that writing guest posts for other people's blogs is a good way to get more readers to my blog. Sounds good to me, but I am finding that it isn't easy to find bloggers who are willing to publish my stuff. Got any ideas that can help me?...

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Rather to my surprise, I found out through a stray email that my son had signed up for a MySpace account. He's 11 and he doesn't have permission to do so. As part of his punishment I am going to delete his account and since it's just a few days old, I'm wondering if I can simply ignore it and have it go away or if there's something special I need to do?...

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I really want to get into writing online, Dave. Can you offer up some tips and tricks for me to break into this area and get some visibility? Thanks!...

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I got a really weird email from a friend on Facebook: it was just a Web site URL and when I went to it, I got a warning message that it was an "unsafe" and that it'd been blocked. What the heck? What's going on?...

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I have been honing my computer skills to try and make some money and start a business. The only problem is i seem to be having troubles finding jobs. Pretty much I'm doing free computer diagnostic. I pick up the computer, diagnose every aspect of how its working all for free. After that I contact the customer and discuss the problem(s) they may be having and discuss were to go with it. This is a...

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You're heading to college - or your child is - and you want to figure out how to set up their shiny new Apple MacBook or iMac so that they'll be maximally efficient and have fun too?  Well, you could go and ask the people at the Apple Store what they recommend, but instead, we went straight to the source, asking undergrad Mac fan Zack Shapiro of the University of Colorado, Boulder for his recommendations.Be...

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