I studied Spanish for 4 years in High School | General discussion | Forum

Get your grammar book and read it page to page so you understand the concepts and reasons behind – don't focus on trying to remember every rule. Add as many examples as possible from your grammar book to Anki and go through some every day. Place the grammar book in your bathroom or the bed so you skim through it regularly. Then begin writing texts and add them to lang-8.com to get them checked and corrected. Everything that gets corrected should then be added to Anki so you learn the correct version.

I learned articles in German with cards looking like this: Artikel (N + M)

Meaning the article for masculin in nominative. The correct answer is der. Then I had several example sentences to make sure I really learned it. You can basically do this for every rule and try to use as many examples as possible – you'll benefit from it in the long run. Just remember that you need to understand it before you add it to Anki. Anki is just a tool to make sure you remember it – if you're not sure about something you need to get it explained first.