We don't recommend deleting LingQs since our SRS system will send these words back at you up to 3 months in the future even after you indicate them as known. Also, by keeping the words in the system, our system will continue to track them in your statistics.
The idea is not to learn 100 words and then work on the next 100. In fact, you should have thousands of words you are "learning" and increase the amount of words you are encountering. At any rate, good luck! Glad you like the site.
I guess what I should have been doing with these words is marking them as known and then going back and highlighting them again in blue. Any other suggestions for how to deal with these words?
@chillies To make as many lingqs as possible and notice them naturally.
There are lots of free programs for flashcarding if learning artificial lists of "necessary" words is what you want, but it's not what LingQ is about.
Though, I strongly believe that you would archive much more in language learning, if you would utilize the way of learning that this site is intended for!
Give a try to this German lesson: http://lingq.com/learn/de/store/43274/68851/buy/ - it explains the principle in a nutshell.
I find the act of reading the texts while listening extremely valuable for language learning and the main point of this program, but what is missing for me is being able to quickly grab the vocabulary that doesn't stick immediately. While using the texts, one has to mouseover each word individually to see the definition. At one glance, one sees one word and one definition, and must also spend about 1-2 seconds per each mouseover. With the lists, one has up to 100 words and definitions all on the same page and can quickly scroll. I can't figure out how to sort this list, as there seems to be just a default sort by alphabetical order.
I of course take it with a grain of salt, but I find the known words statistics to be fun and interesting.