This article is obviously a jumping off point kind of article. Most people using linear regression have never even heard of things like ridge regression. So I like the article.

However, there are at least two types of regression I'd add to the list, and a suggestion.:

1 Multivariate Distance Matrix Regression (MDMR; Anderson, 2001; McArdle & Anderson, 2001).

2. Regression with splines

3. On polynomial regression, add mention of orthogonal polynomials.