Look at the IQ test as a relative test rather than an absolute test. It is not testing your gross amount of intelligence but rather how your intelligence compares to other people's. IQ tests are done this way because IQ is harder to quantify than other things, such as height and weight.
Understand 100 as the average IQ level. This is the benchmark against which your results are measured.
Calculate the effect of the standard deviation, which is around 15. This means that most people will be within 15 points of 100, and the more standard deviations from 100 you reach, the less average you are. The difference, then, between 100 and 115 is not as profound as the difference between 130 and 145.
Look at the nature of the questions. IQ tests are tests of your raw ability. They give you problems to solve rather than information to retrieve, which effectively levels the playing field. Raw knowledge -- such as when certain key historical battles were fought -- is not helpful for an IQ test. An example of an IQ test question is giving a series of letters and asking the test-taker to rearrange them into a word, then answer what category -- such as animal or country -- the word fits in. This forces you to rearrange the word without being able to look for it in the multiple choice answers.
Realize that your IQ test is not a wholescale summary of who you are. There are many different kinds of intelligence, and IQ is only one of them. Indeed, IQ should be looked at as a score rather than actual intelligence -- it is part of the picture, but not the whole picture. So, be careful when describing IQ, because your IQ and your intelligence are not interchangeable.