This is one of the methods I use to study. Each day I choose one word from each letter of the alphabet. I highlight the word so I know I covered it. I also review the word I studied the previous day. At times, I may cheat and look at a word that grabs my attention.
The beauty of this method is that there is a sentence for each word, so I get a chance to see it used in context. I also learn different ways of using the language. If I am serious it takes about 20 to 30 minutes. If I am watching TV or relaxing then it takes an hour or so.
Although it is a beginner’s dictionary there are 3500 entries and over 3500 sentences. It is bilingual so you can check if your translation is correct right away. I learn something every time I study and I also reinforce what I already know. I think it is a good activity for all levels. However, if you are a beginner I would probably tackle a few per day.