Prep for Sunday Mass

http://www.preachingcoalition.org/

http://www.domcentral.org/preach/cathresources.htm

http://www.catholiclinks.org/homiliasenglish.htm

General Exegetical Links:

Preaching the Lectionary
http://www.amazon.com/Preaching-Lectionary-Word-Church-Today/dp/0814613519

Jerome Biblical Commentary: http://www.amazon.com/Preaching-Lectionary-Word-Church-Today/dp/0814613519

St. Paul Center for Biblical Theology http://www.salvationhistory.com/
http://www.crossroadsinitiative.com/library_category/38/Catholic_Bible_Study.html

http://phatcatholic.blogspot.com/2007/01/scripture-commentary-by-fr-william-g.html

http://www.catholic-pages.com/dir/commentary.asp

General Intercessions (Prayers of the Faithful)

Here are some general principles: http://dsjliturgy.blogspot.com/2004/09/10-principles-for-writing-general.html

Good examples of intercessions for Trinity Sunday: http://liturgy.slu.edu/BodyBloodB061409/ideas_other.html

Here are some interesting examples of Corpus Christi homilies (from all three years of readings) and preaching blogs worth exploring:
http://www.vatican.va/holy_father/benedict_xvi/homilies/2006/documents/hf_ben-xvi_hom_20060615_corpus-christi_en.html

http://www.frtommylane.com/homilies/years_abc/corpus_christi.htm

http://www.gnosis.org/ecclesia/homily_CorpusChristi.htm

http://fjicthus.blogspot.com/2008/05/feast-of-corpus-christi-gift-of.html

http://www.ctkph.org/homilies/homilies2006/homily061806.pdf

http://www.catholicpreaching.com/

http://www.homilies.com/

http://deacbench.blogspot.com/2009/02/its-general-mediocrity-of-catholic.html

http://www.americamagazine.org/blog/blog.cfm?blog_id=1

http://www.op-stjoseph.org/blog/tags/Word_to_Life