Use a History List of Your Typed Commands

See the history reference.

$ pwd 
/home/december
$ date
Tue Dec 19 12:49:52 EST 2000     
$ cal
 December 2000
Su Mo Tu We Th Fr Sa
                1  2
 3  4  5  6  7  8  9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30
31                      
$ cal 02 2001 
   February 2001
 S  M Tu  W Th  F  S
             1  2  3
 4  5  6  7  8  9 10
11 12 13 14 15 16 17
18 19 20 21 22 23 24
25 26 27 28
$ history
1 pwd 
2 date
3 cal
4 cal 02 2001
5 history
$ !3
date
Tue Dec 19 12:49:58 EST 2000     
$ !cal
cal 02 2001
   February 2001
 S  M Tu  W Th  F  S
             1  2  3
 4  5  6  7  8  9 10
11 12 13 14 15 16 17
18 19 20 21 22 23 24
25 26 27 28
$ history
1 pwd 
2 date
3 cal
4 cal 02 2001
5 history
6 date
7 cal 02 2001
8 history
$ !!
history 
1 pwd 
2 date
3 cal
4 cal 02 2001
5 history
6 date
7 cal 02 2001
8 history
9 history
$