– Practising a lot. If you keep doing them you will get really, really good. Try just picking something up at random and seeing if you can draw it.
– Ask someone else to check your drawing before you finish it, and never feel bad if they find errors. Even very experienced engineers cross-check: at Brompton my boss or my team-mates check mine and I check theirs, because you never see all of your own mistakes, that’s just being human.
– If engineering drawing is killing your brain, take a break and sketch something else for 5 mins. Sometimes I just sketch stuff on my desk like an apple and then get back into it.