Pardon the link post, but this is a great short walk-through of using LinqPad to execute EF queries against your own model. Great for testing query ideas against your data. Highly recommended.
One note is that while the AutoCompletion extension of LinqPad is great, it not necessary for this technique to work. Please buy AutoCompletion to support the great work in LinqPad, but it isn’t necessary to get it to work.