I think a sampler quilt is a quilt with different patterns all over. Basically there is no basis that you follow and you can do anything you like and put it together.
Here is a link you can check out to other people's sampler quilts:
I got the idea from a dear friend in the US who makes amazing quilts. Check out her amazing blog and creations. She is one very talented lady and a dear friend. http://luvmycrafts.blogspot.com/
I have started one for myself which I will work on here and there until I have enough 6 x 6 squares meaning six little boxes by six little boxes which make up one large square. Here are some of my squares I have so far.
I found an amazing website with patterns for these particular squares and it is so much fun finding ones I like and putting them together. Basically it's like doing several jigsaw puzzles. Wish me luck. This will be an ongoing project I will keep coming back to.
This is the site I have been using. http://www.quilterscache.com/QuiltBlocksGalore.html