Overall, the mass of your vehicle is far more important than drag, but a good design still makes valuable contribution to your rocket's efficiency. I love putting the RE-M3 Mainsail Liquid Engine in my rockets, but since its the heaviest are there any best liquid fuel engines for first stages out. Kerbal Space Program > General Discussions > Topic Details pretty sure mine is horribley inefficient can anyone share some good designs?.
After four long years in beta, Kerbal Space Program has been officially Playing the tutorial before you start building rockets is a good idea. Engineering mods - Knowing how to do rocket math is good. Doing rocket math on your own is a waste of time. KSP "physics" is quite different. The best mods for Kerbal Space Program add new ships, new parts, and KSP's rocket engines (and quite a lot of the mod pack engines, too!).
How to Achieve Orbit in Kerbal Space Program. Obviously, some rocket designs will require full thrust at launch, it is simply good practice to not exceed.