read materia medica--for example tf allen --will see pulsatila (as examlpe) sensation left side nostril ..etc ---u need just consult MM and see if ther e any conflicets with symptms --as direct with modalities as pertain in general and particular locale--get as muc info in case--siphon for peculiar -starnge-uncommon with reference to il at hand--rep to give direction take top remedies and read MM---and sort away til certain key ponts are covered by remedy---that the trick--finding and determining key characteristic symptoms---wont hurt once well to stat indulging in hahnemann's organon as well his other works--this willl give strong base