I empathize with your concern and frustration justme4know! If you chose to keep track of login and form fill history during installation and still have the LastPass extension installed, log back into it, open your LastPass vault, then click on the down arrow at the very top of your vault between the LastPass icon and your email address. Select History. Do you see any logins from strange IP addresses or any logins at strange times? Irrespective of the above results, I have no good news for you. The entries in question were absolutely generated using your login credentials, and those credentials are compromised. My opinion is based on the extensive scrutiny LastPass receives from independent security researchers and third party auditors. The LastPass code that controls hashing and encryption in the non-binary extensions has been viewable and testable by the public for the past 5 years. I'm certainly not saying that LastPass is 100% bullet proof and will remain so forever. I am saying that the most plausible explanation at this point is that someone has obtained your login credentials. I would strongly recommend using Better Half's computer to change all your passwords in the quickest time frame possible. You must use an extremely strong LastPass master password. I can point you to quality random string and random word generators if you wish. Please be sure to delete all vault entries that are not yours. If you notice any strange entries appearing after making these changes, you'll want to consider the possibly that your computer has been compromised. Locate a computer security expert(s) you trust and ask for advice on how to proceed.

using an imaging program is the best way to get every thing including your operating system backed up, you can use a program like Acronis True Image and back the image up to any of the methods you mentioned, I prefer to use an external usb drive myself. there is a free program for imaging a drive also. DriveImage XML Using Acronis you can purchase Acronis from that site also for a much reduced price. If you just want to continue to only back up certain files then any method you named works, I use a variation of online storage backup, flash drive, and external hard drive, having some back up off site such as an online storage locker is good in case of fire or loss of the other backups. http://www.adrive.com/ they offer quite a bit of free space.

Typically the slightly fancier (read expensive) external hard drives come with more comprehensive software. That's not to say, you couldn't back-up manually, use Window's back-up software, or find some freeware that will accomplish the same thing. I would suggest sticking to drives made by Western Digital or Seagate. They seem to have the best track record for reliability. A second, off-site, backup plan is a better plan. While an external drive will be helpful in case of a hardware it won't help in the of something like a fire. There are online options or you could, depending on the size of your back-up, burn DVDs and put them in a safety deposit box or send them to a trusted relative or friend.

Many do extra copies. My view is that it's probably not necessary unless you're really serious about what's being stored, and if so, part of your backup plan should be to keep one copy "offsite" (like in a safe deposit box). Which you should. There's no reason to accumulate raw image files if you aren't going to be working with them further. I'm not a big believer in "what if".