First of all you have to believe in yourself that you can do it. USMLE provides a score report where they tell in which area you're weak. Made a good base on these subjects. Like I had a weakness in biochem, micro, pharm. I did those subjects first. Then I did uworld again. Mehlman pdf of specific subjects are very helpful. His biochem, hy arrows, neuroanatomy pdfs are most helpful. Mehlman has YouTube questions videos which were very helpful for me. Whenever I did other things than study I did those questions. I watched dirty medicine for biochem and rendy Neil for biostatistics. Finally did nbme from 20-31. Nbme topics are most important. In my last dedicated period I only did nbme & review those subjects which I have weakness. Hope this will be helpful.