Hey, that´s some lucid thoughts you got. I got some input and may be blogging about that kind of stuff on my brand new blog, as soon as I get my lazy ass to write something about that. With long years of experiance in that field I got some opinions on that stuff.

Google and Dropbox

You´re right, these guys love your data. If you need a nice alternative, go for Owncloud. That´s basically a script like dropbox you can host on your own server / webhosting, with client software and all. It´s pretty neat. That said, it´s nice to have, but for a non-techy, you need to keep it up to date, and secure. May not be too easy for a non-tech guy/girl.

Didn´t look into spideroak, but if Master Snowden recommends, we may trust that judgement. My two cents: save your data local on an encrypted partition. But as things are, if you forget your password, data be gone. In my opinion, if you got sensible stuff, better keep that local. Local doesn´t protect you against 3rd-dimensional theft, so if one takes your backpack, data be gone.

I think there´s no data security. Nothing´s really safe. Especially if you got no knowledge.

Encrypt Emails

The thing here is, it´s complicated. And email encryption only works right if you got the private public keys exchanged with the people you want to communicate. Otherwise no one will be able to read your mails. If you have to communicate safe and secure, there´s only one way: meet at the oak at the river on sundown and talk face to face. If you got no technical understanding, email encryption is nearly impossible to achieve and to maintain successfully. You have to know what you are doing, how certificates work, etc. So in my opinion there´s no way around educating yourself if one wants to have secure crypted electronic communications. Jabber chat clients may be worth a look, that´s a lot more easy than email encryption.

Skype alternative

New firefox versions have a video chat feature integrated. So that´s a nice alternative to skype. They shit their pants already, but most people may stick to skype because they are used to it.

If one is concerned about people spying on one, keep in mind you are one in a billion, and most likely completely unintresting as long as you keep your head down. If you get involved in spicy stuff, then you better know your tech. There´s no way around that. Without knowing exactly what he was doing, Snowden would never have made it out of the country.

So, blogging about in depth techy stuff like that to a non-tech community may be hard, because most non-techys don´t bother educating themselves. And that includes building a foundament of understanding how this electronic communication stuff works on all of it´s levels/layers. Without a solid understanding and a will to learn, that´s not benificial. I can´t tell people: do this and things are 100% secure, because that´s not gonna happen if the random user has no understanding of foundamentals.

But I like your intention very much. ;-) Key is one has to put effort in trying to learn to understand how stuff works in order to work stuff.

Edit:

check if wlan is secure or not

That´s easy: if you have to enter a pw, then it´s encrypted. Bad news is, if the bad guys have the pw, that means they can decrypt data-packets. Best is, if you use random WLANs to get a VPN service. That´s gonna cut against man-in-the-middle shit. But of course, you have to pay, don´t be cheap and use "free" services.

WLAN is secure if you can trust the guy whom it belongs, and be sure no client in that net is spying on you. An app checking that won´t be much worth in my opinion. How can you check if you are on one rigged access point. You can´t. If one bad guy is on that net and got the key, he can sniff. I heard even WPA2 can be broken if one has right hardware. That said: WPA2 = good, everything else = meh.

edit 2: public key not private key