Get up really really high.
Put the engine to idle.
Keep feeding up elevator until the nose drops anwyay.
Hold the full up elevator, and add in full rudder (and sometimes aileron) in the same direction.

That should result in a spin.

To exit the spin, put all controls at neutral and wait. Sometimes a bit of rudder in the opposite direction or a bit of down elevator will help. The plane should stop rotateing and drop the nose in to a vertical dive. Now add throttle and pull out.

Here's why MinnFlyer didn't want to tell you this:

- Some planes will get in to really neat looking spins that they won't come out of. So you spin all the way to the ground. *splat*.
- It's really easy to under-estimate the height needed to get out of a spin. So you fly straight in to the ground. *splat*.
- It's common to see guys exit a spin, then yank the elevator too hard to get out of the vertical dive. The result is a stall, and sometimes another spin right to the ground. *splat*.

So, the odds of a spin resulting in a *splat* can be high if you aren't careful. I agree that you should talk to someone with experience, and maybe let them spin your plane before you do it.

Some planes won't spin at all until the CG is moved back, and the control rates are increased. This is especially true of trainers.

Here are a few manuvers to try before you spin, just to get the feel of things:
- vertical dives. Just go up high, cut the throttle, and push the nose down with the elevator. Let the plane dive vertically a little bit, then pull out. Some guys find this un-nerving. But it's the exit if a spin, so if you panic here, you aren't ready for spins
- straight ahead stalls. Go way up high, cut the throttle, and hold elevator to keep the nose level. Keep feeding elevator until the nose drops. Then add power and pull out. You'll want to get familar with how your plane stalls anyway, so this is good to do with any plane.

Back on the origional question, a little up trim in the elevator is common. Before you mess with anything, fly the plane and roll inverted. How much down elevator does it take to stay level? If the answer is "very little", then you're good to go. If the answer is "lots, almost full stick", then you've got some stuff to adjust. As mentioned, the CG and wing-stab relitive incidences are good places to start.