Here is a free-ware resource i use all the time for a tengwar guide.
Dan smith is highly knowledgeable in the tengwar and their various modes. This was a part of a website called "tengwar textbook" but has since then disappeared from the web.
Sometimes, when I'm too tired/uninspired to draw, I'll just sit and transcribe random passages of poetry or Bible scripture and it is so relaxing! It's fun and creative and looks so good! Result!