Hi, Lorettan,
Ya know, I think that we tend to put a LOT of undue pressure on ourselves. I have trouble with the 1/4 inch seam too, and so some of my blocks would be ok and some would just be nightmares to match up and seam that last row. Was it my cutting, I wondered...So I tried to be more consistent in my cutting. And I dug out my 1/4 inch foot.
I bet that if you looked really closely at those heirloom quilts we all rave over, the ones that our grandmothers and great-grandmothers made, our accuracy would beat the pants off of theirs. They quilted out of necessity. Now we quilt for fun and beat ourselves up if it isn't perfect. Bottom line, as my husband keeps reminding me, is that if you are having fun, that's what counts. 100 years from now, nobody is going to stand up and should, "But Lorettan couldn't sew a straight 1/4 inch seam!"
Just keep sewing. Some days everything will come out beautifully, and some days you'll wonder why in the WORLD you took up sewing. Then grin and pick up another one of those hateful triangles!