Learn only three or four things at a time

The short term memory can remember between five and nine pieces of information in one chunk. When the brain is given too many pieces of information to remember it installs amnesia.
This is what happens when you study too much information at once. This is exactly why cramming for an exam, the night before, is not effective. Have you ever done this? Shoved all the information in the night before a test or exam only to discover when you sit in the test or exam room, you can remember studying the information, what side of the page it was written on, what you had for dinner, what you were wearing - everything except the information you need. This is because you are studying too many pieces of information at once and your brain chucks out.
As a rule of thumb, your short term memory can only cope with 7 plus or minus 2 pieces of information at a time. That's anywhere from five to nine pieces of information.
When remembering a telephone number, we often break it into smaller chunks. The smaller more manageable the chunks, the faster you will pick up the information. Break your study content into small pieces so you find it easy to recall.
Learn three or four pieces of data at a time, then revise it, check you can still recall the facts. then learn three or four more pieces of information, revise these and the last chunk'. f you still know this, continue this way, always pausing to revisit the previous chunks.