I voted 6 months, which is about how long it took to find what works for me in most weather conditions. I only try new things for fun.
Suave/VO5 conditioners for washing and conditioning (2 or 3 times a week).
LA Looks sport Gel (every day)
Jessicurl Confident Coils
(mainly because I like the smell. I don't use it every day)
I never get 2nd day hair and wet my hair every day (unless I'm not going anywhere, then I just put it in a pony or headband).