The fastest way is to be mentored by other architects. To me, these are the tools architects should know.

UML

1) Sequence diagrams

2) Domain diagrams

3) Sitemap diagrams

Other 1) Ability to do domain to data model conversions

2) Ability to create diagrams defining data flows

3) Ability to define interfaces and data exchanges in between systems.

If you have any qs, also feel free to pm me.