I have kind of developed a set of keys that are broadly similar across games so it might not be the most intuitive set up but it is as follows:
r-ctrl = crouch
r-shift = jump
enter = boost (in vehicles)
end = enter/exit
page down = reload
insert = grenade (or flares in vehicles)
home = spot
page up = prone
MMB = knife
mouse 4 = fire mode selector
mouse 5 = change view
Things like chat I have moved to Y, U (team) + I (squad) but I started online gaming with TFC/counter-strike so Y/U are natural to me.
Things like map/map zoom stay as M/N (not that important).
Scores stay as tab (I can look when I am dead or the round ends - I am not one of these scoreboard addicts).
change seats stays as F keys (not that important).
change guns = scroll wheel.
Delete would be voice comms in game if such a thing existed://
Backspace is my talk in teamspeak 3 button.
You might have to bear in mind that I am 6'3 and have big hands that a tall person might have so for me it is no real stretch to get to these keys. I do have to make sure that the keyboards are arranged correctly - no gap between up and end is horrible. and I have seen some have the insert bunch of keys in a 2x3 arrangement rather than 3x2 and again I couldn't use it. A laptop keyboard would be hell for me too!
The sooner you get behind, the longer you have to catch up.