I am having trouble putting my bike on its centerstand
Using the center stand on any motorcycle can be daunting if you don't know the correct procedure. Here is how to put your bike up on the center stand. Study the following illustration, and note where the sidepanel handle and center stand lever are located.
You may wish to have a friend around to help catch the bike if anything goes wrong.
First, make sure you're on basically level ground. Never use the center stand on any kind of incline except when the bike is pointing straight uphill. Even then, it's better to leave your bike in gear and on the sidestand than use the centerstand on a slope.
Next, extend the sidestand so you've got a backup in case anything goes wrong.
Now, standing on the left side of the bike, put your left hand on the left handlebar grip, and your right hand on the seat, to steady the bike. With your right foot, push down on the centerstand's lever until it touches the ground.
With the stand's feet just touching the ground, gently move the bike side-to-side (ie, tilting towards and away from you) until you can feel that both feet of the centerstand are touching down. Keep your foot on the centerstand's lever, or it'll spring back up to the retracted position.
Now, holding the bike level with your left hand, move your right hand from the seat to under the sidepanel handle (directly above the passenger peg). Curl your right hand under that sidepanel handle, so you can lift there.
With your foot on the centerstand lever, and your hand under the sidepanel handle, extend your back. That is, pull with your right hand, and push with your right foot. Do this pulling by straightening your back. It shouldn't take a lot of effort, but it definitely requires a solid lift. Don't pull with your left hand, it's just there to steady the bike.
If you feel you're not strong enough to get this to work, let the bike back down, and try again. This time give a sharper upward jerk on the handle, to get some momentum behind it. As long as you're pulling straight up, you can pull as hard as you want without fear of hurting the bike.
If at any point this doesn't seem to be working, use your left hand to pull the bike towards you so that it can land safely on the sidestand.
Getting the bike off the centerstand
It is safest to take the bike off the centerstand while sitting on it. It's very easy for the bike to overbalance away from you (and crash to the ground) if you try to roll it off the stand while standing to the side. Always get on the bike first, then push forward. If you can't reach the ground easily from this position, it is safe (when done carefully) to put the bike in gear and use first gear to roll you off the stand. Use your common sense. If there's any question, the sidestand is always a safe choice.
Centerstand spring hint
Should your centerstand spring need replacing, here's how to get it back in place, without trying to use a pair of pliers, having said pliers slip off, and having the spring sail through the wall of the garage, or your foot.
It involves using pennies (and you thought they weren't good for anything...) Basically, you bend the spring sideways to open the coils, then stick pennies between them to keep them open. Sometimes you have to bend the spring back and forth, adding more than 1 penny to each slot. It takes some time, and can be a little fiddly, but it's pretty easy to do. Then, when you use the centerstand the first time, it'll stretch the spring longer than you have before, and all the pennies will fall out.