Back in the 80s and 90s, all I purchased was SRO tickets. I haven't purchased SRO tickets since the Chicago Stadium days but I remember the following:
At least get there when the gates open 5pm(preferable earlier because their will be a line; similar to bleacher seats)
Seek out a good spot to view the game.(no blind spots/handicap areas)
You will need to box people out for position during the game.
If you go to the bathroom during the game you will lose your spot useless you buy someone a beer.