Pushto is very interesting and scoring subject. It is easy too, but getting top marks in it is no easy as true for other subject of css. But few things i would like to share.
1) It is very important to get high marks in it,for it can boost your merit at the cost of little investment of time compare to other subjects.
2) Pohana(Author Sahar Gul Katozai) is the bible of css Pushto syllabus.
3) Those whose academic have throughout been in Private schools or where in public schools,they have not been through Pushto, they need a little bit more efforts, but no need to worry, they can learn how to write the text easily by just reading Pashto magazines like Khyber Taroon.
4) Besides, Rehman Baba and Khushal Khattak life,poetry etc should be very part of our memory.
5) For idioms,though Pohana is enough,yet for those who are interested,they should visist a bookshop just attached to Peshawar Uni Pashto Department. I forget the author name,yet just asking for Pushto idioms will be suffice.
Last,read http://www.akhbarekhyber.com/tarun_magazine.php,it will help alot.