Making my next big profit, but how??

Hi dear board members,

I'am totally new to this board and I'am already inlove with everything here.

I've been reading and watching tons of CPA/CPS affiliate stuff, but never dared to actually try it. But recently i finally managed to do that.
What i basically did was that i chosed my market, i was even lucky to find a 3 word domain name that matches the exact top keyword used
in that area. I went on trying to promote a clickbank product, i only redirected users to the actuall product withouth using
any landing page, to attract traffic I setup a google adword campaign, and believe it or not i managed to earn approx 200$ in 1 day sometime after the
campaign was up and running. i was offcourse extremely happy at the begining. When my adword campaign budget was completed i tried to run the same campaign over and over
for several weeks but without any luck. i believe the first profit i made was pure luck, or what do you guys say? i can see that i do get alot of traffic
from my adword campaign but nothing converts. Should i make a landing page for the product i'am promoting? what if i want to promote several products, do each one of
them need their own landing page? There is so much i would like to ask you experienced guys here and i appreciate all comment/feedback!