An outline is a PLAN, and having a plan before you begin will make writing much easier and keep you focused. Once your fingers are engaged in the process, your brain will follow. Take each group of cards in order and write. Double space your rough draft. When you've gotten through all your cards and added a conclusion, print out a hard copy and save your work on your computer.
Some students find that they can talk about their topic more easily than they can write.
Try dictating into a tape recorder, then play the tape and transcribe it into your computer. Now you have something on paper to work with. Wait 24 hours. Reading aloud helps you catch grammatical errors and identify incomplete or awkward sentences. As you go through your rough draft, make corrections, reword, and identify points that are weak.