Methodical is exactly right, because a blue screen is Windows reporting a specific fault rather than a vague catastrophe and the fault code plus a diagnostic order turns panic into a process:

Read the actual error first, since it names the cause: the blue screen shows a stop code, MEMORY_MANAGEMENT, IRQL_NOT_LESS_OR_EQUAL and often a failing file name and that code is the single most useful clue, worth photographing before the restart. A recurring same code points at one cause, while varying codes suggest something more general like memory or storage, the pattern itself being diagnostic.

Recall what changed, the fastest cause finder: blue screens frequently follow a change, a new driver, a Windows update, new hardware, a new program, so if the crashes started after something, that something is the prime suspect, reversed by uninstalling the driver, rolling back the update or removing the hardware. This resolves a large share of blue screens faster than any deep diagnosis, the what changed question always worth asking first.

Boot to safety if it crashes too fast to work: if the blue screen hits during startup, Windows should eventually offer the recovery environment, from which Safe Mode loads minimal drivers, letting you work to uninstall a bad driver or update and System Restore rolls back to a working point before the trouble, often the quickest whole fix when a recent change caused it.

Run the hardware checks when no change explains it: Windows Memory Diagnostic tests RAM, a leading blue screen cause, chkdsk tests the drive and updating or reinstalling drivers especially graphics addresses another common source. For recurring crashes with varying codes, RAM and storage are the usual physical culprits and the reliability history plus Event Viewer around the crash times add detail. The stop code searched alongside your specifics guides which of these to prioritize, turning the worst situation into a named fault with a known fix path.