I actually like to sew half square triangles! And that's a good thing, because the border of my Mixing It Up quilt needs 184 of them (Ok, that's a lot of HSTs. Almost too many.)
I make them by pairing squares, marking a line from corner to corner and then sewing 1/4" away from the line. I've tried all of the other methods but I really prefer this one. I always cut my squares slightly larger than pattern specifications and then trim them down to the exact size. If the pattern says to cut squares 2 7/8", I cut them to 3 1/4" or even 3 1/2".
This gives me larger squares than I really need. I trim them down to the exact size using the diagonal line on my 6" square ruler as a guide. I like how my components are accurate after trimming. This method also lets me focus on the cute parts of the prints - I sort of fussy trim them to capture the flowers, cherries, strawberries and spatulas.
All that trimming can be calming once I give in to the monotony. I just have to watch out for that rotary cutter and my fingers!
And three hours later I ended up with a big pile of scraps and 184 2 1/2" HSTs!
All lined up, like cookies on a baking sheet. I love this Bake Sale fabric from Lori Holt (and a few pieces of Polka Dot Stitches, too). And now I can make the mixer beater blocks for my border!