The first rule of bedroom organising is to have a jolly good sort out before you start. Once you've tackled the chore of filtering out what is and what is not needed, you will have a lot less to organise and put away.
To declutter your home for good go through clothes, make-up, jewellery, books and tech to decide what can be kept, donated, stored and chucked. Then sort the remainder into sections: those that are needed and used regularly and those that are not, and organise accordingly.