To go along with this, a way to cut straight lines is handy.
Branded ready-made saw guides can be very expensive, but it is very easy to make you own (I made a few to use depending on if the cut is very long, 'typical'', or just short lengths) and are much quicker and more accurate then using a straight edge to push against. I use mine all the time
Check out the following video with a very good 'how-to' to make your own