Have the right tools for the job
These are the tools I think every tinkerer should have in their setup. You can get more expensive versions of each of these tools, but these are the ones I recommend.
A 3d printer is a modern day Maker's most powerful tool. The first printer I ever used was a $3000 MakerBot Replicator 2, and 7 years later it's still printing decently, but for $240 an Ender 3 produces similar if not better results with more flexibility of materials.