*** Do a proper taper appropriate to your CURRENT level of fitness/fatigue.
A generic taper might not be best for you RIGHT NOW. Look at TSB (CTL and ATL) on the training load plugin on SportTracks software (Free) or there is a similar one in Training Peaks WKO+ (not free).
You’ll need HR data going back at least 45 days and you’ll need to understand (eventually) that tapering is NOT just about maximising race day TSB but also that it is about optimising the FALL in your fitness-potential. (It must fall for your fatigue to fall even more).
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 : https://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.