hunting them down

Recently, I've been encouraged to really hunt them down. I hope it will work. I actually think that showing up in person will confirm that you'll get what you want i.e. to set up an appointment to meet with them. But, on the other hand, you may (big may) be perceived as slightly irritating, annoying or over persistent. I really do not want to be perceived in any of these ways. Do tell me, how do i ensure that i get what i want, present myself as initiative but hold back on the 'too persistent' and keep myself on this end of the line?