For the F/S shove it, it's essentially a F/S 180 sans body rotation. Tt requires a similar scoop, and the board is going in the same direction, so it's a good trick to know.
Knowing the B/S pop shove it is also useful, since you'll be used to the board leaving your feet on a trick.
The heelflips will help you with the balancing part. You'll need to be in a similar stance, since the 2 biggest problems with heelflips and F/S shoves are landing in front of the board.
Other Skills:
Be able to control your scoop. Know how to scrape the tail and exaggerate scoops.
Also, don't dip your head down. Keep your shoulders and weight over the board. Do not lean forward and look down. Just squat, in a similar fashion to a heelflip, or the board will end up behind you.
What You May Find Useful:
As much as people hate on this, try doing them into the grass. They didn't build Rome in a day... you have to build up to it. I didn't learn 360 flips down 3 stairs, i learned them into the grass. Do F/S shoves into the grass if that's how you feel comfortable, then, once you're fine with that, take them to the streets!!
Doing The Trick
Positioning:
I keep my back foot in the back pocket of the tail, with mostly my toes and the ball of my foot on the board. My foot isn't really on the tip of the tail, but it isn't totally wedged off into the side.
For my front foot, i keep it a little behind the front bolts, and completely over the board. i usually have my toes hanging off the side. the front foot doesn't play an enormous part in this trick, it just keeps the board from flipping.
Motion:
With shove its, you need to be going at a normal speed, since this trick requires momentum. if you are doing this stationary, you're going to land on the nose constantly, if at all.
So, at your decent speed, squat down, toilet fashion. Do NOT dip your head in, or you won't land this trick, and i can assure you that with 100% confidence. Keep your shoulders over the board, and your weight over the board.
Do a little hop, and scoop the board forward, trying to extend your back leg. the back leg straightening out is a popular little style flair a lot of people do, and personally, I think it makes the trick a lot easier to do. So kick your back foot forward, but make sure that you scoop the board in the direction you're rolling as well, or you'll end up on the nose. roll at a slow speed first when you're experimenting, so you can figure out how you're going to go about getting the scoop. It differs for people. For me, I like to scrape my tail so it won't flip as much.
So with your scoop going along, all you need to do is pick up the front foot a little bit. Keep it so that it is sort of guiding the board around, this way, it won't flip over mid rotation. Now, having your front foots toes hanging over the board will come in extra handy. If your foot was too close to the other side, when you catch the board, it might hit it, and do a half late flip, which will land on top of your foot, and your back foot will land on the board, thus, crushing. Also, there's the possibility of shinners, which are always obnoxious.
To sum all that up, keep your weight over the board so you will stay over it, extend your back leg out for an easy scoop, and keep your front foot in contact with the board.
Video Trick Tips:
Troubleshooting
The biggest problem you're gonna have is landing too far forward. Just stay centered over the board, and you should be fine. Dipping your head in causes that, so i would aim for shoulders over the bolts. It's going to feel weird at first, but with time you'll get comfortable.
Once you're feeling comfortable with F/S shoves and heelflips, throw them together for varial heelflips, which are widely regarded as gnarvelous.
Another fun trick to do is to learn F/S shove it reverts, which is a F/S shove it, and when you land, you weight the front truck, and whip the back truck around like a backside 180. Stevie Williams does a lot of switch B/S shove it late F/S 180s, which are similar to these, only opposite.
a Great trick to learn is F/S big spins, which are difficult, but look awesome. they're easier than F/S 360 shove its by a long shot.