all the elites use zMUD bots and expensive VR equipment to chase effectively
chasing is the skill that should be concentrated strongly..it is more important than about anything else (tactics wise)
There are two main ways to chase: make them use up their moves (herding through forest/mountain zones, forcing recalls, skills/spells, etc) or cut them off (expecting their turnaround, outspeeding, taking shorter path to same destination).
Of course, the ideal situation is where you don't really have to chase (as in the simple trick someone described above)
A good way to practice brute speed is to have duels in places like the ford and elium, where wide open areas require pre-thought and pattern matching for effective, consistant chasing.
Once you play the game enough, you can really start to see the stupid patterns people get into...so just keep your eyes open and remember what that char did last time in a similar situation
That all said, running skills are a dime a dozen..perhaps one of the easiest things to do. Which means chasing is one of the hardest skills. The most tell-tale sign of a great (instead of merely decent/good) player is in the speed that they chase you...those are the people you really need to fear because you can't easily avoid them, depending on circumstances. Winning in combat is only one step...