Some of my thoughts on tutorials which might be helpful:

- How to expand a lot, similar to the LotExpander tutorial:
http://www.modthesims2.com/showpost...3&postcount=410

- How to shrink a beach lot, special restrictions and recommendations. Be sure to include all of the advice in this post, so that everything will appear in one place.

- How to make a corner lot, alleyway, service road, square, etc, using the Portal Revealer and buyable portals to enhance the usefulness of these additional roads. Here's a brief post to get you started:
http://www.modthesims2.com/showthre...458#post1931458

- How to make a functional roadless lot, using the Portal Revealer and buyable portals to maintain sim's ability to use the lot, even though there is no road. Notes on special handling:
http://www.modthesims2.com/download...971#post1984971

- How to move a lot away from the road. How to make a park to fill the blank spaces between houses in your neighborhood.

- How to build a lot on both sides of a road.

- How to build above a road, one floor up.

- How to share roadless lots and lots which are built "over the road". Special handling required for lots built "over the road". Here's a brief post to get you started:
http://www.modthesims2.com/showpost...1&postcount=181

- How to unlock the tiles on a lot, and why you would want to do this.

- How to adjust a lot created on a MAC:
http://www.modthesims2.com/download...763#post2035763

- How to flatten the edges of a lot:
http://www.modthesims2.com/download...408#post2122408