Imagine a straight line from your shoulders down to your heels. Keeping your abs tucked in and lifting not only with the strength of your arms but with your abs will do it!
My best strategy is to make sure my elbows are at shoulder width, and in a fairly comfortable position. After that I make sure that my back is straight and I’m not slouching. I just have to keep encouraging myself to push until the timer is done! Hope this helped! 🙂