Richard Lustig, 7-time lottery winner, highly advises against quick picks.[2] He argues that picking your own numbers keeps you from getting combinations of recent winners (so long as you've done your research!), thus increasing your chances.[3].
If you are playing your state's lottery, don't bother checking to see if old winning numbers are available online. Just because a number recently came up, that doesn't alter the odds of it coming up again. Today's randomly selected numbers aren't affected by any other day's randomly selected number.