I waited over a year and a half in-between taking my test! It was hard to start studying again, but all of the knowledge comes back to you. Marlene Hurst of the Hurst review has a great online program and an online booklet you can print up and it is amazing. Also I took the NCSBN course online...they have a lot of questions on there. These were great for content reviews, but taking test questions helped me the most. There are a lot of downloadable practice questions out there. Even if you have to pay I would advise getting a program and doing this over and over. Especially if you can find one that has rationales because you are learning while you practice taking test questions. Most programs have practice tests that will tell you what areas to focus on so you don't have to study everything. Hope that helps!