It's clear to me that in their zeal to streamline the RPG part of Mass Effect, Bioware took it too far and didn't even bother explaining how some of the fundamental rules and game mechanics work. Why can't you control other party members better at hacking when you need to enter a computer? How do I upgrade weapons?
This thread is for Mass Effect tips and tricks, it is NOT for impressions or spoiler discussion. That thread is here.
A few things to get us rolling:
Hacking, Electronics, etc.
For skills like hacking and first aid, it's the combined skill of your active party that actually affects the outcome. So if you have someone really good at hacking, when you approach a computer and initiate the hack their skill plays into the action even though it's your character doing the task. Same goes for the first aid skill tree. Combat skills are all limited to the specific person they're applied to, far as I can tell.
Upgrading a Weapon
When you have a weapon, armor, etc. equipped in the Equipment screen, press 'X' and you can apply different upgrades to it. You can also remove them and use them somewhere else. Make sure you upgrade your armor too!
Haven't done this myself, but if you're close to an enemy, just face them and press shoot. You should smack him with your gun.