Lifelines in knitting

Wow it's November already, hope everyone had a safe and fun Halloween, I still have sugar rush just by giving treats to little monsters and also big ones in my neighborhood. I manage to have 3 projects in my needles so far, 2 projects are pretty much the easy shawl and the one row scarf, yes I'm still working on my Christmas presents, hopefully ill get them done by the end of this month. I actually challenge myself by knitting my first lace shawl. I use a pattern that I got from Ravelry, it should be a beginner lace shawl/shawlette but I actually frogged it so many times but I am not going to give it up, so far I am on Row 9 ... 63 more to go :D and I do not want to ripped my project back from the beginning if I make another mistake which I am sure will happen so I decided to try the lifeline which is pretty much a scrap yarn threaded through the live stitches on the project, as you continue knitting,the scrap yarn will stay on the stitches and if for some reason you make or I make a mistake and needs to rip back I only have to rip back up to the lifeline (scrap yarn on your stitches), this makes a lot of sense and it would help prevent frustration from starting all over again especially when working on lace pattern. On the picture below is what i have knitted so far and as you can see there is a white scrap yarn for my lifeline, I will keep going and plan to place lifeline maybe every 5 rows just to be safe. I will try to post more pictures of my progress. Happy Knitting!!