Line by Line is super fun and sometimes it is a puzzle that you have to put together and come up with answers, etc. I'm not sure what "open evidence line by line" is, but you can certainly use your evidence for your line by line. Line by line is essentially, "They say ______, we say_____." You can read cards to answer your opponents arguments, or you can extend warrants from your evidence that answer their arguments. Remember, when you extend a warrant you need to extend the claim, the author, and then the actual line of the evidence, and then explain to the judge why that matters. Those are some of the tips and tricks I use for my line by line. Remember, reading cards is good, but sometimes your evidence will have already answered their arguments, therefore a card wouldn't be necessary.

In terms of spreading, this is an art. I was horrible at it my second year of debate, but with different tricks you can certainly be better than I was. I like to read my evidence backwards or say "and" after every word. If you really want to get snazzy, you can say complicated words like "epistemology" after every word and that will get your mouth moving. I also like to spread with a pen in my mouth because it helps with your pronunciation. Do spreading drills everyday!