MOD(sorry
) interation like how can things be done better/faster/different using other mods then GT.
A few things I've found helpful:
Anything enderIO seems really good. I use the SAG Mill to process my yellowrite ore, coal ore, and diamond ore. I also sometimes use it for redstone ore if I'm in a hurry and don't want to wait to go through the entire GT ore processing chain. The eIO alloy smelter is also pretty quick once it's upgraded with capacitors, and the eIO stirling generators are the best cheap and easy RF generators I've found (plus they don't explode like some ic2 or BC ones can). Also the various eIO fluid, item, power (rf) and redstone conduits are glorious in every way. I have all my coke ovens automated with eIO pipes. All my jabba barrels are fed with eIO item pipes. I pretty much stopped using hoppers to input/ouput from machines anymore and use eIO item conduit. I also have advanced fluid conduit running all over my base now taking steam to remote turbines/machines, water where needed, oxygen where needed, and pumping nitric acid into my sludge factory. I also use the eIO farming machine to keep providing me wood, netherwart, wheat, and sugar cane when I'm offline (MFR farm only harvests when you are online). Be warned that if you plan to use eIO stuff heavily you'll want a steady source of gold (zombie pigman farm). Also I think setting up an iron golem farm early is a good idea. I also use eIO vats to turn apples and sugar into fuel that will generate RF and I also use vats to turn zombie flesh and netherwart into a different type of fuel. Both these types of fuel power my eIO farms, MFR farm, oil refinery and several powered spawners for quite some time (until BR turbine).
The Production Table from steve's workshop? is amazing. Max it out with fuel efficiency upgrades and such. It's probably the most used block in my factory. I pretty much quit using vanilla crafting tables and furnaces after finding this. I also find the work table to be handy for crafting repetitive items like basic circuits or machine casings as it will store 9 patterns. You should be able to find both of these in NEI.
JABBA barrels are great. Iron chests mod is great. Forestry stuff. Extra Utilities has awesome stuff, but some of it is mid-late game (the stuff requiring a QED to make). Dimensional anchor for chunk loader. Pneumaticraft looks fun, but haven't dabbled there yet. Railcraft (tanks and boilers for sure) has some good stuff.