You've got Double Action Only (DAO), Double Action/Single Action (DA/SA), and striker safe-action type pistols on that list. My advice: figure out which trigger system you prefer first, it will help you immensely. You may very well change at a later date, but it will narrow the field.
Know the status of your weapon
Keep your muzzle oriented so that no one will be hurt if the firearm discharges
Keep your finger off the trigger until you have an adequate sight picture
Maintain situational awareness