I have a love-hate relationship with my sewing machine!

Ah the joys of the modern age! I can sew at the speed of light compared to hand sewing. That is if my machine will cooperate with me. I have been sewing all evening and not a misstep anywhere! It is truly amazing. Yesterday, however, I sewed for 10 minutes and had to take every seam out and resew just to take it out all over again. I'm not sure where the difference is. It boggles my mind!
I am attempting to sew a large quantity of products for my business in order to build up my inventory. I am planning to begin sales imminently, hopefully on a large scale. I am working on a blog, Etsy store, and a Facebook page to use as advertising and sales tools. I am also hoping to attempt selling at a farmer's market probably in Medicine Hat for the summer and in Edmonton in the fall. I have been able to do quite a bit of work despite the problems with a temperamental sewing machine!
Thus my love-hate relationship with my sewing machine! I couldn't work with out it but some days it won't work with me! Thank God for the times when it does work and I can get lots done!