How do I easily learn those "boring" subjects
By changing your attitude and making them interesting!! A way to get interested in a boring subject is to figure out why you will need it later in your life. I call this "What's In It For Me" or WIIFMs. By making the connection that you will really need maths as a resort manager so you will be able to calculate the profit because your bonus is a percentage of the profit; this helps to hold your interest now while you're learning it.
Also remember, that you talk to yourself 50,000 times a day – and who listens? YOU DO! If you tell yourself you can, you will. And if you tell yourself you can't – guess what – you won't! Positive self talk is the major key in building up the right attitude.