A common misconception is that you need to make Anki a daily habit. Bad days (when I'm tired, stressed or have a headache) would cause me to fail quite easy words that I could otherwise get spot on. Even if I already started my reviews and I notice any of that, I just cut the session short. It is ok if you do reviews only 80-90% of the time, the algorithm still works fine.
Whenever I fail a word, I try hard to find a reason for it. Most of the time it's interference - my answer resembles some similar word that I already know. I make a mental note about it, add this other word to the card. In most stubborn cases, some redundancy is good, I create another card for the same word in another context or just for a derivative of it.
Another thing that works for me is adding images (some of my cards just have a picture on the question side), and example sentences with the word in various contexts.
Whenever I fail a word, I try hard to find a reason for it. Most of the time it's interference - my answer resembles some similar word that I already know. I make a mental note about it, add this other word to the card. In most stubborn cases, some redundancy is good, I create another card for the same word in another context or just for a derivative of it.
Another thing that works for me is adding images (some of my cards just have a picture on the question side), and example sentences with the word in various contexts.