The only time-saving tip I can come up with other than what was suggested (piece the orange triangle block like a 9 patch with half square triangles, and the big square for the half-square triangles) is to chain piece the blocks - sew two of the nine-patch pieces together, then before releasing the pressure foot, continue with the next set of two pieces, .... Then when all of those are sewn for a set of blocks (however many you want to do at one time), add the 3rd square/half-square triangle, and chain piece those. This saves a lot of time cutting thread (and saves thread), and prevents the problem getting the stitches to go straight when you start sewing on each new piece. (To avoid this with the first seam, sew first on a starter scrap of fabric.)