How to get better at the PSAT?

I just got back my score and it was 1510. I'm a sopre.. and I could have done so much better but I didn't know the tricks well and I was too slow. Like the main problem was that I skipped too many questions cause I ran out of time. How can I get better and prepare for the next time I take it? I'm going to take those special cles to train for the PSAT for next year.. my main problem is time management. Like what else can I do, like now for example? Thanks a lot!