A complex question with a complex answer. For years I was the "no success" guy. I was what I now call a "contributor". I would show up at a tournament, pay my money, and someone else would take it home. My biggest failure was that I was a one trick pony. I launched my boat and beat the bank, and I wasn't even good at that. Then one day something clicked. I found an offshore weedline and won my first tournament.
Since then I have won quite a few, I'm trying not to sound full of my self but I have finished first in more than fourty tournaments since. I would attribute that success to learning to find fish in different areas and mastering new techniques. Here is another wrinkle. Learning new techniques doesn't mean you have to try them all. I have fished against people who always have to try the latest hot bait or presentation. Learn a few things and perform them well.
This doesn't mean not to try something new, It just means that you should have a varied arsenal that you feel comfortable in throwing. For example, my must haves include a jig, which is my go to bait, a senko, dropshot, c-rig, topwater, and a ned rig. I always have other baits and presentations ready but I probably win most of my tournaments with those. I'm not saying that you should use the same ones, just that you should have a half dozen or so rigs that you have confidence in.