what software do you use? basically keep the camera level, ie on a tripod or just keep that in mind as you shoot, watch key points in the edges of each photo and make sure the adjoining photo/s overlap slightly, then its just a matter of getting the software to help you align and merge.
or you can just crop one image down so that it is a long format!
@kali66@wenbow - if you're on microsoft 10 you will find in your programs a function (or maybe it's called an app, why, i'm technologically illiterate) called "image composite editor" which i call MICE the M standing for Microsoft. that's what i use for panorama. and that's my secret. :-D aces on this, wendy.
or you can just crop one image down so that it is a long format!