Doing different things, mix what I do.
Missions, check what they reward, and pay attention to what material/data they give, all that give grade stuff is worth checking out!!! great for trading other grade 5 materials/data.
Missions will offer a varied selection of things todo to get the material/data rewards.
So even if the mission that does not seems to fun todo, but for 5 MEF (grade 5 data), delivering those 180 T of something to a station 450 000 LS away, but if you find two such missions? to the same destination, changes the priorities... so check if several missions go to the same destination, sometimes you get lucky and can bulk up on a full load in the Type 9/Cutter and cash in nicely some 15-20 minutes later, and earn 10+ Grade 5 material/data.
Try to avoid the trap of "I need this now", take your time, do the low level upgrade, get the experimental effects done, pin the blue print, and do the high level rolls later as you have collected more material/data. Also do not underestimate the power of the engineers only doing low grade of something, they can apply the experimental effect, so for instance thrusters, go to Felicity and do Dirty Drives G1, apply experimental and have the blue print pinned from Palin, so you can roll up to G5 later that way.
Take your time, over stock, G2/G3 rolls is superior, the different is very noticeably at this level, so they are not bad by any sense, and they can later be improved by remote engineering and pinned blueprints, once you have more materials available!
I never seems to be completely done,
I have atleast 8 ships that I am almost done on...
I have atleast 8 ships that is 50% engineered, or are still using legacy engineering
I have atleast 8 ships that I have prepped for engineering, and have long jump range to go and visit the engineers.
I prefer to fly my ships around, to get a feel for them, and to actually feel the difference when doing stuff. visit a nav beacon and shoot at some pirates to test out the upgraded weapons etc. make a journey out of this, that could take days, but most of the time, an evening is enough to visit enough engineers to add all the desired experimental effects, and then use remote engineering to finish all the modules that I ran out of materials on.