I consider myself quite the optimizer, and while I've been doing so I've made quite the collection of small little bonuses that our resident spellcasters would surely appreciate. Thinking as such, I've organized these bonuses in the following document:
An overview of Caster Level and DC increases.
If anyone would like to make some suggestions for the list, be sure to notify me. If these suggestions are in the form of new options for the list, please do so in the format used in the list. Make sure that any options suggested conform to the limits in the list(1st paragraph).
