To improve in your trading abilities, all you need is to seek more knowledge in technical and fundamental analysis, and while doing that, you have to learn how to control your emotions like fear and greed, because without being able to control your emotions, all your knowledge in technical and fundamental analysis will be laid waste.
Another thing that needs to be worked on is your ability to manage your risk properly, because that's what keeps you in the market, if you don't know how to manage your risk properly, it wouldn't be long before you blow up your account, so it's a skill as important as the rest of other trading Skills.
Furthermore, patience is one Vital trait a trader must have, you don't have to trade anything you see in the market, it's important that you are patience enough to trade only the right set up, and all these that I have made mentioned, the only way you can improve on them is to seek further knowledge, because knowledge and self control is very important in trading if you want to be profitable and successful in the market.