Start by learning all the critical things like Skills, MCP, Agents, etc.

Then look up skills and MCP tools that reduce token usage, improve recall, improve searching, improve parsing, etc

Then learn how to use sub agents bound to cheaper models for more expensive operations (the largest of which us always search and find ops)

Swapping to a cheaper model for a subagent with the job to just go find a specific thing alone can reduce costs like 30%, equipping it with tools that can search and find faster can push that to 70%