How might level 1 Wizards prepare to survive 1 or 2 serious-but-level-appropriate hits in the process of fighting or retreating?
One gnome in particular emphasized alchemical grenade attacks followed by short-sword attacks before using spells, and Adragon Van Basten, the "Mage-Brute" was a standard sorcerer (with the Draconic Breath feat) who wore scale mail, used a maul and almost never cast a spell in combat (for a variety of reasons).
Specialization & Focused Specialist help with the spells/day thing.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.