Basically, rather than adding new stuff, you work at integrating what you've learned so far, SO good to revise you learned in break time with feel free and not add new stuff till you reapeat you learned and with overloading not create stress,,,which will confuse you always..
i think you repeat your all end on every day and also repeat your all on end of week..
hahah maybe you feel it like mad but it is true, that choose main points of from your every lecture and write on chit and put on walls,door and ever those things which you use mostly and see again again,,, this is my experience and i got good results with this method
Other wise there are many tips for this but mostly i preffer reapet again and again and note on paper with pen are best option which i realized @cryptoctopus