Random Numbers

=RANDBETWEEN(100,170)

Random Dates

=RANDBETWEEN(DATE(2011,2,14),DATE(2012,8,27))

Random Text

Put the text as given in below

And then use the following formula

=INDEX($A$1:$A$8,RANDBETWEEN(1,5))

Generating Random decimal nos using RAND function

=RAND()