[PhantomGremlin]

Here's how Jerry Rice, probably the greatest wide receiver of all time, practiced: http://jamesclear.com/jerry-rice It's a short read and very instructive.

One amazing thing is just how that practice translated into so little time in actual games. I.e. if a football team plays 20 games a year (1 hour each), and the offense is only out there half the time, then a wide receiver is playing for at most 10 hours a year. Jerry Rice played for 20 years, so that works out to 200 hours of actual game time over his entire career!