I often post links to free online practice for the GRE and SAT, but there is much more available at your local library. Check out the prep books and work through them. Even if they are a few years out of date, chances are the majority of the information–especially the actual practice problems and tests–are exactly the same this year as they have been for the last two or three.
I go through many of the new SAT and GRE books every year just to make sure my SAT and GRE prep courses are staying on top of the latest techniques. Guess what? There are almost never any new techniques! The prep companies tend to just fix errors (and introduce new errors they’ll be fixing next year) and rearrange the basic layout a bit.
CAUTION: Make sure you visit the GRE and SAT official websites to look over their latest news and updates, when things do change significantly, that’s a great place to find out about it. I will also send out an email update to my list to keep them on top of things. You can sign up for my list here.
Here’s a link to a previous post that will help you make the most of those prep books. Although some of the post is for premium members only, there is plenty of useful stuff freely available (especially the link at the bottom about “my personal picks” for which GRE and SAT prep books to use).
Another CAUTION: One study found that buying a prep book had no effect on SAT scores–zero. Of course, “buying” a prep book is not the same as diligently working through the prep book. The highest increases in scores came from taking a prep course; the more personalized, the better (ie. high school sponsored prep courses were somewhat helpful, private SAT prep classes were more effective, and one-on-one tutoring was most effective).
If working through a difficult prep book by yourself is not best for you (and it’s not for most students), feel free to contact me about live, one-on-one tutoring via internet (blair [at] studyprof [dot] com). If you are in the Bryan/College Station, Texas, area, check out my live classes at http://studentsuccess.tamu.edu.