Generating stats by rolling dice is kind of a bummer, because if you roll
a bunch of 14's or something then you're stuck with a crummy character for
weeks.  (This always seems to happen to me.)  Instead, we'll use the
"point-buy" system described on DMG p20.  You get 28 ability score points,
to be assigned as follows:

Ability Score	Point Cost
8		0
9		1
10		2
11		3
12		4
13		5
14		6
15		8
16		10
17		13
18		16

So, for example, you could build a character with 18/16/10/8/8/8 stats,
one with 16/16/15/8/8/8 stats, or one with 16/14/14/14/8/8 stats.  
Remember that you get to increase one of your stats by one at fourth 
level.