One area that needs practice is visualisation. The speed with which you change items into pictures is (almost) the speed with which you can memorise them. Almost relates to how fast your association skills are, and how well you know your journeys.
Many books have a glossary (list of important words). This is fantastic for practicing your visualisation skills. As these words WILL come up at one stage of your studying that text. Do not put them on a journey, for the moment, it is enough that you change them into a picture. Take one item: you have a picture? Fine. Move on to the next.
Keep it light-hearted, keep it playful. If you don’t find a picture for one word, simply move on to the next. Also, find a pattern, system that works for you. You may do (only) 10 items per day. That gives you a specific goal, and therefore it is a lot easier to achieve (than saying: I do all of them, because then you might say: that takes to long and I’ll do it tomorrow. Take it from me: that tomorrow will never come. However 10 items: yeah, no problem. And within a very short time you will have changed most (or even all) items into pictures.
And the rest is as before!!!