How to? Centre point & "crosshairs"

nuclearmoose

Hey everyone!
I'm modeling some pieces for woodworking, and when I make a pattern for cutting and drilling, I often forget to put a centre point / crosshair at the centre of my arc and circles. This has led to some inaccurate drilling. I just finished designing a piece that has four holes that I need to drill, but it seems like such a pain to go back and place a centre point and extend some construction lines out from there (crosshair) so that I can clearly see where to drill.

Has anyone come across a script/plugin that does this? If not, what would be your suggested workflow for doing this most efficiently as I model?

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