Just try and understand them. Listen to Goljan explain this part in renal section. I thought the way he broke it down made it easier for me to remember them.
Draw a flowchart for yourself- 1st split is loss of protein < 3.5 g/day vs > 3.5 g/day... then find ways to separate out within each category.
For nephrotic, rem which is #1 most common, which is 2nd most common. Remember that hematuria/RBC casts usually not feature of nephrotic syndrome. I don't have my notes on me... but you get the gist.