1.) I suggest a lot of practice with timing. Timing is the most difficult thing in Reading because it is not enough. So, you have to get used to doing everything quickly and correct. Do practice tests and time yourself. In this way you will know where you stand and where you need to get better.
2.) Read a lot in English. In this way you will get used to reading quickly in another language rather than your own and you will get better without even realizing it. You should start off by reading articles online related on subjects you love and find interesting.
3.) Try to understand the logic and what you need to do in each separate task of Reading. In this way you will be familiar with everything and you will not waste time during your actual practice.
4.) Do not read everything. You will waste valuable time. Train yourself to distinguish the gist of each paragraph along with important specific information: skimming and scanning!
5.) Always read the instructions carefully and Underline key-words in the tasks.
6.) Be careful of paraphrasing. Train yourself so as to recognize same meanings that use different phrasing, different words that is.