yes, just go over the past papers of the previous years and identify the main qus that come up, make sure u hav a strategy for answering those. Secondly, take some time to rest and just ponder over possible questions in your leisure time. Make sure that you have the right equipment and finally get a good night's sleep!
If its edexcel prac, then simply go over the flame tests for chem and make sure u know all the apparatus. U may want to go over some Cambridge IGCSE alternative to practical papers if u find Edexcel insufficient!
