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Ensure your paper templates are not too thick. You will have to tack through them so a thinner paper will save your fingers in the long run.
Cheat with a glue stick. If you can't be bothered to tack the fabric to the template neatly, then simply fix it in place at the centre with the minimum of 'dry' glue and finger-press the material over the edges.
If you have a box of scraps and a box set to watch on TV, you might as well combine them and make up a stack of hexagons to use later. Pop them in a shallow box in rainbow colour order so you can see what you have and what you need at a glance.