Tools for Navigation:
A class one Brain.
For paper charts;
Dividers & Compass. (the difference is that one has pencil lead in one leg)
Parallel Ruler with a Navigation triangle or Two Triangles.
#2 pencils or a mechanical pencil
white rubber erasers (the best for charts)
Scientific Caculator. ( I perfer the Casio FX300 series)
Up to date charts.
latest weekly Notice to Mariners to keep those charts up to date.
A work book for your navigation notes.
Most importantly: Learn to use your tools before you even go offshore. There are a lot of Navigation exercises that you can use for learning how to navigate.
Learn Coast Piloting.
GPS is a good tool... Learn to use it properly and don't rely on it 100% of the time.
Now you can go coastal.
For the crossing of Oceans learn celestrial Navigation. GPS's have been know to give up the ghost every now and then. And I have had three of them quit on me.
But then I am a professional Navigator and have always double checked the electronic tools with OLD FASHION means of Navigation. And have found that the modern Electronic tools to be off a bit. They don't always agree with the charts.
Note: GPS has had me from a few yards to a couple of miles from where I was really at. It really shows up when you are on a bayou and the GPS shows you a few hundred yards on the shore.
A side of the above have a nice sail