As TheEdge has said , get in a cab if you can , it helps a lot more with stuff like junctions / sidings etc because you can actually see them out of the window . If there are any unusual dispatch procedures watch them a few times . If you can get an instructor to go out with you then take that opportunity to work over that unusual dispatch procedure .
Always ask other conductors when out and about route learning . For all managers who brief you on routes have route knowledge its the conductors who you will be with when route learning that actually work over them every day so know all the little parts of it like the back of their hand .
And as TheEdge has just said try and jump our or look out of the cab droplight at every station , it helps when reciting a route if you can picture the stations in your mind .
when I route learned I pieced it together bit by bit
First just focus on getting the stations in order -For this I found being in the back cab and making the announcements for the conductor whose service it is was particularly helpful as you have to think before you speak - think about any specific risks at each station as well - be it a signal that's hard to see ,a big gap ,platform curvature , large step down , unusual dispatch sequence ,passenger characteristics and numbers .
Once I had the stations in order and what was at each one then I focused on what was between each station - so between station A and B there is junction A, then you go past the x sidings , into the x tunnel , over x and y viaduct and then z tunnel just after the tunnel there is f level crossing and finally before station B there is C passing loop .
Between B station and C station there is x viaduct , y sidings and then F tunnel .
If it helps you remember it look out for other things outside of the railway environment to pinpoint location , things like reservoirs , distinctive buildings , golf courses etc might help you place certain route features .
Id get a blank piece of paper and try and write the whole route down and then look at my actual notes for the route adding in the things I missed . This way I only ended up writing it down a few times . Some people write it down till they forget something and stop there which I didn't do because I found you ended up stopping pretty early when you knew a lot more of the route it was just little bits missing .
most importantly dont get yourself down if you are having difficulty it will click eventually . And we all have that one route we just dont click with for aaages .