If you have a smartphone then you probably carry it with you most if the time. Here is a tip for homeschool spelling word lists. I use my iphone to keep a spelling list for each of my kids. Any time my daughter asks how to spell a word, I pull out my iPhone and add the word to the list. This also helps me ensure I am spelling the word right. Below is a picture of the list for my son.
If there is a word my children spell wrong when they write, I also add it to their list. I can add words from the list to thier spelling words for the week.
Hope this helps. If you have anything that helps I would love to here from you.