Boy, keyboard tricks!
For angled fsmashes, you don't have to press all three keys at the same time. You can press right/left, then up/down, then A. It still hast to be very fast. Down/up, then right/left, then A also works, but it has to be even faster. I just press diagonal, then A immediately after. This makes it easier to me than all three keys at the same time, because if I try pressing them at the same time but press A before any of the other two, it comes out wrong. It's like when an acciaccatura is easier to play than a perfect chord on piano.
Did you know you can walk from standing?
Press down, then immediately the direction you are facing (not an acciaccatura this time, since you have to leave down pressed, but it has to be just as fast). Then release down. Your character should now be walking. You can also do ftilts and down-angled ftilts from standing this way. Pressing down and a direction after a tilt also allows you to tilt again without your character walking after the first tilt (useful for wall combos).
Edit: Woah, 500 pages.