I was thinking, and it does seem like a fair point that older posts could (should?) be removed from the various forums. Probably best to raise it in the "Suggestions" or "Discussions" forums as a new post though. I'm sure there will be plenty of people who would like very old posts to be deleted. Useful information that should be retained should really be in wiki pages and the like, not transient posts within forums, so automatic deletion shouldn't be an issue.
As for tips. When I first started playing I tried to fill up lots of the central squares, and forked my roads and rails into the exits. After a while playing I learned to try to focus on getting one long road and one long rail, with the connectors plugging them into the exits. Even with no central spaces taken it would usually score in the 60s or even 70s. I then progressed to still having a long road and long rail, but have one of them "wiggle" through the central spaces. It seems to work well quite often. So in general create one long road, one long rail and try to leave them both flexible on the faces needed so that you can cope with most of the rolls thrown at you.
Also watching the replays of a few of the games of top players can be good for learning how they construct their board. Even the experts don't always get it right, but they do tend to cater for a wider range of rolls than their opponents. Have fun!