Learn how to use the navball, basically. It takes a bit of getting used to but it starts to make sense after a while. Here is a Mun launch, in stages
1) Launch vertically upwards, keeping velocity around 100-120 m/s to minimise drag
2) Rotate the aircraft so that you are facing east
3) Begin pitching down around 10k. I normally go down slowly to 45 degrees, then start pushing down a bit more towards 60-70 as you go through the ascent. as you go through the atmosphere you can start to increase speed.
4) Use the map view and keep an eye on your Ap. Depending on your speed you will probably find you reach an Ap of 100k around the 80-90k mark, at this point you cut your engines.
5) As you approach around ten seconds of your Ap, you want to do a prograde burn. The closer your burn is to the Ap, the more even your orbit will be (ie, your Ap will stay at 100 instead of increasing). How close you can get to the Ap with your burn depends on your thrust to weight (TWR). Once you get your Ap and Pe pretty equal then you're in orbit.
6) Line up with the Mun. If you have the Mun at 0 degrees relative to Kerbin then you should be burning round about 120 degrees. Use a manoeuvre node on the map and fine tune it so you have a Mun Pe of <10k.
7) Transfer to Mun, do a retrograde burn at the Pe (opposite of the circularisation burn when you took off from kerbin) and then another retrograde to land.