I'd highly recommend that you consider a free tool/service like LastPass, KeePass, or SuperGenPass to allow you to easily use a different password for every service.
Thing is, it really is convenient. If you do not want to set that up, you can always have a password like ThisIsAPassword-Hubski for hubski, or ThisIsAPassword-Facebook, it is slightly safer, makes the password stronger, and it actually helps discover where a leak of passwords came from, as usually someone will dump the passwords on pastebin without a source, and passwords like that will help identify it.
It is slightly more secure than using the exact same password everywhere, as when one site is compromised, the password can be put in a wordlist for brute forcing or hash cracking. So instead of using ThisIsAPassword for every site, you have a slight variation but it is still extremely convenient to remember it.