Hi
I'm no pressure points expert, however assuming you have access to someone to show you various pressure points in the first place, what was used in my jujitsu training was something called scarecrow practice whereby a parner stands with arms spread and you spend say a minute working all the way around the body striking the various points.
after a while these points can become second nature and you can target them in your normal practice.
Also very useful for developing ability to use different forms of strikes eg. we would practice only foreknuckle strikes, finger spear strikes , hammerfist strikes, ridgehand, archand etc.
Cheers
D