You make a recognition-only deck, with a format similar to below. As long as you pull the sentences from real Japanese, it's up to you what you add. It's important to base the card around one word/element. If you have 5 words you don't know, you have to remember them all to mark the card as correct, which can make the SRS less effective.
Manga with furigana, textbooks, and the PDFs are great sources because you don't have to worry about looking up the words with a kanji dictionary. If you're studying a JPod lesson, try copying the sentence(s) containing the grammar point and vocabulary, likewise with your textbooks.
Question
そう簡単に言うなよ。
Reading
そうかんたんにいうなよ。
Answer Version 1
簡単
simple
Answer Version 2
It's not that simple! (lit: don't say things so simply)
簡単
simple
Answer Version 3
簡単
(形動)[文]ナリ
(1)物事が単純で、理解や扱いが容易であるさま。
「―な機械」「―な問題」「―明瞭」
(2)時間や手数のかからないさま。てがる。
「昼食を―に済ます」「彼は―に承知してくれた」
〔幕末から用いられた語。はじめは多く「簡短」が用いられた〕
[派生] ――さ(名)
You should have the answer part as you feel comfortable. Some people have a translation of the sentence, while others copy the definition from a 国語 dictionary, but that's not easy if you're still around beginner level. You might find a combination is most effective. It's important not to think in terms of English, but I find the example sentences themselves, and the right mentality, help with this.
If you haven't read any Manga before, then
Doraemon might be a good starting point. Despite the wacky premise, there's lots of everyday language, the stories are nice and short, and a lot of cultural topics, like those covered in the blogs, tend to pop up. In fact, since every Japanese person knows who he is, you could say Doraemon is part of Japanese culture himself
if you haven't read any real Japanese before (stuff not aimed at learners), you'll still find even kid's stuff difficult, but just stick with it and pick up what you can, while continuing to study your textbooks and lessons, and before long you'll be reading novels