Tips from About.com
http://scifi.about.com/c/ht/00/07/How_Good...r0962933665.htm~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
How to Be a Good Beta-Reader
From your Sci-Fi / Fantasy Guide
Authors need real help when they ask for a beta-read or editing job..
Difficulty Level: Hard
Time Required: Thirty minutes for a short story
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Here's How:
Make sure the author sends their story in a format you like (e.g. Word Perfect, Microsoft Word).
Save a new copy of the story with your comments to send back.
Put all your comments in bold.
Run a spellcheck before you try to read the story. Remember to bold the corrections, or if you're using plain text, put them in brackets.
Read it through the first time making only minimal comments as you go. You'll come back later to lengthen them.
Correct all the grammar problems you see. If you're not sure about something, indicate the problem and say you think there's something wrong.
Mark places that read awkwardly whether they're incorrect or not.
Comment whenever a character "sounds" wrong to you. Try reading the dialogue aloud to see if you sound like the character.
If you have no comments for large sections of the story, delete those sections.
(note: this isn't always a good idea. - McG's Cat)Comment when you're aware of an emotional reaction to the story (e.g. "I'm happy that happened." "That's gross!").
Remember to have both positive and negative comments.
Always be tactful, and phrase all advice only as a suggestion.
After the first read-through, take some time, then read through it a second time.
Put your over-all comments at the top of the story so the author gets them first.
Be honest. If you don't want to beta for the author again, tactfully say so. If you do want to, be sure to say so as well!
Tips:
Before agreeing to beta-read, know the type of story you'll be getting, and its rating.
If there are a whole bunch of technical errors, you're not responsible for fixing them. Just tell the author there are many.
Use reference guides to check how to spell character names and Star Trek equipment.