** If you can’t run an even split (constant pace). My understanding is that, for most ‘normal’ people, the best tactic is to run the first 1 or 2 Kms slightly faster than the 3rd and 4th (you sprint the end of the 5th which is faster).
All the suggestions are starred:
*** 3 stars. IMHO it will work
** 2 stars. It might work
* 1 star. Can’t hurt
X 1 cross. It CAN hurt if done wrong.
All 50 tips are shown here as a series of posts : http://the5krunner.com/tag/how-to-get-a-5k-pb/ or on twitter using #howtogeta5kpb. They are all SHORT-TERM tips that will work in the next week or so with varying degrees of success.