Baisc SEO Questions.

bumping back again.

Future,

• Titles should be choosen to accurately describe the page, with as few "extra" words as possible. However, do not sacrifice readability for your users.
• There are guidelines for meta keyword, description length. I prefer around 100 characters. However, vBSEO will automatically handle your metas for your forum pages. Meta description, and keyword are traditionally given the most attention in SEO.
• Theories vary on choosing a max URL length (# or keywords in CRU). I prefer including concisely worded forum titles. I also prefer having keywords in the thread titles, rather than just ids. If you prefer URLs of shorter length, I recommend enabling our vBSEO cropping feature.
• I would recommend using the vBSEO feature to add rel=nofollows to printthreads.
• Max number of threads and posts is debateable. You might prefer to keep it a bit shorter to improve page rendering time and decrease the number of links to external sites (in posts).
• vBSEO confirms the archive into a convenient sitemap. If you use this feature, you will not require any other vBulletin.org plugins related to the archive.
• I recommend using similar threads if (as you stated) your forum can handle the performance impact.
• In general, a reduced number of external links would be my suggestion. However, if the links you do have are to relevant sites, that is even better.
• H1s are still effective for SEO.