Start broad, then cut fast: Begin with a card job like removal, ramp, or sacrifice payoff. Use name, rules text, or type first, then tighten the pool with mana value and legality.
Use color identity for Commander: When you are building for Commander, switch the target to color identity so hybrid symbols, activated abilities, and reminder text do not slip through.
Let one filter answer one question: Set filters should handle printings, legality should handle format, and rules text should handle synergy. Avoid stacking redundant filters too early.