Learn how to play draws properly, don’t just call any amount with them. There is usually more chance that your draw will miss than it will hit. That doesn’t mean you can’t call bets with them, especially since chances are you’ll get additional money if you do hit, but most beginners greatly overplay their draws.
Study the odds of hitting your draws and the other factors in play to decide if continuing with a draw is profitable. Remember that you can also play aggressively with draws when the situation allows for it. It is bad to always play draws passively. It is even worse to start playing them aggressively against a calling station though, so think before you act.
The basics are the strategy articles and the hand judging forums. You learn the basics from the articles and use it while you play. You can then present hands you found problematic to a professional hand judge, free of charge, who will comment on it in order to improve your game further and clarify problematic areas in the theory.
Extra material exists in the form of videos made by professionals and coachings in which coaches play and you can watch. You will be provided with a thorough explanation of why certain actions are made, allowing you to get into the head of higher level players. You can also ask questions during coachings to clarify things further. All of these tools are invaluable in taking your game to the next level.
There is a saying that says that even when you are the 10th best poker player on the world you will still lose money when you go and play with the 9 best. This saying holds true on every level. You have weaker and stronger opponents on every level. Don’t let ego stop you from leaving a table when the opposition is particularly tough and keep actively looking for tables with the most fish. This practice is called table selection.
Please note that the opposite is also possible. Some players keep on losing and blame it all on bad luck. If you decide to bluff, bluff properly. If you keep losing over a longer period of time there are definitely problems with your game. Keep working on improving your game and on getting rid of the problematic areas in your game, the so called leaks.Keep your ego off the tables and hunt down bad players.