While I'm sure a resident html expert will pop in soon, but til then, to get a break you to <br> Which if I did that right will be a less than symbol, "br" and a greater than symbol. it is used like this:
This is on the next line even though I typed it on the same
And another line.

Your browser has a function burried in on of the menues called something like "View source" If your confused about what I just said, go to that funciton, and compare what I just said to the results.

There is also a html thread someplace you should look at. Good luck!