I swear by mind maps and just repetition, its not very fun sadly, but everything sticks that way with me. Put your mind maps for different topics next to your bed and read it and concentrate on it for like 10 minutes before you go to bed, and eventually it sticks for me!
Not very cool, or really fun, but its the only way I can do it! I often keep thinking about work stuff when I go home, think thats the kind of job a science career is though
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