I have a site that has some very strong performing inner pages that represent a large percentage of the traffic (unfortunately). I've noticed lately in webmaster tools that the most important keyword of one of the pages, which is also it's title, is gradually declining from the #1 spot to now something like 2 or 2.1
1) Can I trust webmaster tool's position information? Traffic seems to confirm it.
2) Are there any special techniques or ideas for pushing the thing back to #1 again?