If something suspicious happens at your blog that you didn't do?

I have had a couple of times when people got into my site and hacked it over the last few years. If this happens to you, the first thing you need to do is to change your password to a more difficult one than before. Don't choose your pets or your relatives because they might be able to find that out. So, the more esoteric or full of numbers or other characters the better. However, don't forget it so you need to write it down some place you can find it or YOU won't be able to get in either especially if you have to travel or work someplace and you cannot work on your blog for a day, week, or month or whatever.