In reply to lasonj: Best way I find to calm the mind when setting an ice screw. This is my recipe ...
Climb leashless if the route is not alpine and you can escape it relatively easily. Climb leashed but with quick release leashes if climbing a route where you really can't afford to drop an axe.
Plan the pitch and try and rack up to save your best screws (least blunt) for any desperate placements you can forsee (runout and vertical) where you will need to make the placement quickly. It's a big mental boost to know that the next screw you are going to place is brand new!
Be tactical about where and when you place screws, always place a good one just before the hard bit. But try not to run it out over the bulge in case it plates.
Definitely be on the lookout for good threads as you can save a ton of energy that way.
When the ice is good -
Set a good axe high on the non-screw setting hand, bend your kneees a bit to hang straightarmed on it. Prepare the placement using the axe in the hand you will use to set the screw, clearing the surface crap and any bumps of ice that will prevent the hanger turning and chipping a nice starter hole about 1" deep. Usual comments about getting the screw at hip level where you will be able to get the most weight on it.
This is the bit that has really helped my head this year - Now place the axe in the screw-setting hand solidly at shoulder level and slightly to the outside of the place you're going to set the screw. Clip a quick draw through the hole in the spike and clip to the rope. I equate this mentally with clipping the bolt on a sport route it really puts my head in a better place for the next bit ...
Set the screw using the palm of the hand and put as much weight as you possibly can on it. Don't be afraid to take your hand off the screw to get another turn on it. This is often the hardest bit for me, I'm trying to figure out an intelligent way to keep hold of the screw if it does fall out of the starter hole which isn't too much faff - does anyone have any systems they use?
Once the screw seems like it will continue to bite start turning it using the handle (assuming you've got Turbos or something like). If it feels as if it's stripping try torquing the screw a bit sideways in the hole sometimes it gets a bite that way and will continue driving. If it does strip go back to using the palm to drive it.
Carry a manivel to finish driving the screw when the ice is hard. If you have BDs (like me) it can save a lot of energy.
Once the screw is driven transfer the QD from the axe spike to the ice screw hanger. I use a QD setup with solid gates on the hanger end and wiregates on the rope end. Make sure the solid gate end is easy to place in and out of the spike hole in the axe otherwise you end up stressing about knocking your axe out when you unclip to transfer.
Place plenty of screws - the more you place the better you'll get at it!
When the ice is bad -
Do whatever you can from the above list!