As Jay Gruden is fond of telling us, when it comes down to the final few roster spots in setting the 53-man roster, special teams play is the usual deciding factor.
The first piece of advice usually given to late-round draft picks and undrafted college free agents? Go find the special teams coach, introduce yourself, and tell him you want to play for him. Make yourself indispensable to the ST unit.
Terrelle Davis often recounts the special teams play he made in his first preseason game as an undrafted free agent that got him noticed by the coaches and ignited his Hall of Fame career.