Or really easy (but maybe not as elegant as johngiggs):
fileone.sh contains all the commands you want to run.
filetwo.sh has other commands in it. When you want to run all the commands listed in fileone.sh, just add in filetwo.sh:
/path/to/fileone.sh
and the commands will be executed. (Be sure both files are exeutable.)
But if you do want to become more complex in your scripting, you do need to know how to use read.