What are your tips on improving your APFT score?

My personal record in the past was a 300. I was in my 20s and I was motivated by a woman over 40. I said to myself if she can do it I can, too.
For me on the pushups and sit ups I did three sets of the most I could do and then add one in increments. I would also use weights for toning my upper body. I do sit ups on a bosu ball now. For running I used to run 4 miles twice a week with sprinting and six miles once a week for endurance (run slower but steady).

I have scored over 300 on several occasions and easily maintain a 270. The simple truth is that I give myself diagnostics all the time. I do the pt test at least once a week to maintain. Getting to the 300 required me doing the pt test Monday Wednesday and Friday.

I looked for this same question, and I will tell you what I did. First of all I was over weight but I passed my tape test at nearly 193lbs with a 38in waist and a big neck but was I happy with that? The answer is just, no. I have not been a PT stud for my entire career, but I am now at the age of 39 years old others around me know this, Soldiers and superiors alike. To make this shorter than short, I reduced my sugar, increased my complex carbs while reducing my simple carbs greatly, increase my protein and I ate ten times a day. I coupled a rigid work out regiment with my new eating habits. My weight dropped, my body fat also dropped, my lean body mass increased along with my APFT. I started doing 90 to 100 push ups and sit ups in the APFT. My run is in the 13s. Guess what, I don't do any of the three in my free time. I do run every now and then for fun and I do compete in races but that's eat. What I do is I replicate movement in a low impact setting which promotes a good APFT score. I work my upper, middle, and lower body. It took some time but I don't think you were looking for over night success.

Personally just pace your run and do 30 push ups every night starting out and for everyday add 5 after that and sit-ups too helps a lot and on record on record it's crap but that was before airborne and the run killed it but it's now a 285 was a 268