You must keep up with wards and take a warding trinket. Remember a Nidalee that has infinite sustain never has to back and a Nidalee with wards will see all incoming ganks.
Overall you generate lane pressure by always keeping mid in lane, meanwhile you can poke them down as well punish them at 6 for mistakes and over extending. With the sustain you allow yourself to forever throw spears as well as forever heal yourself. Simply with a few ganks and maybe a blue you become a monste. After that he/she pokes their mid lane opponent down and 1v1's him leaving you free to roam around 6/7 while denying their midlaner the chance to roam. Remember. Wards will keep you alive and you being alive means you regan more and more mana to heal and poke.