Who do you know? If you do a "family tree" of most NFL players, you'll generally see a direct link to a relative or coach who also played in the NFL.
We see hundreds of top level talent not make NFL teams because when it comes down to selection time, it's the relationship to a brother, father or coach that is or has been affiliated with an NFL team.
There are less politics at the UFL and Arena league level, however, less positions and less pay as well.
Our advice is, in addition to staying out of trouble, working out and making game film, we highly recommend building a personal relationship with someone in the NFL. If you have talent, you will at least get a look.
Sam Olajubutu, an undersized but extremely productive linebacker at Arkansas, was asked at the NFL Scouting Combine where he thought he would go in April’s draft. Olajubutu, an upbeat sort who is used to being dismissed due to his height (he measured in at 5-8 at the combine), shrugged, gave his best guess and moved on. 
Across the board in the NFL, teams have recognized just how important the NFL Draft is and why investing in good scouting is the best move a franchise can make.
Check out Darnell Dinkins. He fell through the cracks at Pitt due to an injury. He got hooked up with a minor league football team after college and quickly made it through the ranks as an undrafted free agent.