I wasn't too sure what I was gonna fill this with when I first took off and there are no guidelines, write what you feel like writing!
I got myself one of these paper blanks as its a hardcover therefore less likely to get ruined in a backpack, and looks fab too. You can get them online and in Easons for about €15.
I used the same travel diary for Thailand, Oz, Alaska and Canada. It is full of the funny stories, the ups and downs, the shitty places I stayed in, the amazing places I stayed in, and the fantastic people I met along the way. Travel diaries are simply a fantastic way of holding on to the memories you may start to forget.
If you are off on your travels, get yourself a diary. I intend on getting a new one for my weekend breaks so I can remember those stories in years to come too!!
pssttt... if you wanna know what the heck SBBC is click here