One important piece of information I realized I forgot - Your headshot dimensions should be 8 x 10. Also, for clarification, the categories on my resume are:
1) Theatre
2) Theme Parks/Reviews/Cruise Ships
3) Children's Theatre
4) Training
5) Education
6) Special Skills

Where to order headshot prints:

https://www.thepixelpusher.biz/headshots

https://www.dirtcheapheadshots.com/headshots

https://www.amazon.com/dp/B071HL3KMP?rw_useCurrentProtocol=1&ref=BN_US_W_P_R_A_DG_LN_419_aptt_lngmsp&ref_=amb_link_ofaaC4CATey4bGUR00ab2Q_4&th=1

https://quickcolorlabnyc.com/price-list/

https://printheadshots.com/

*And a bonus I just learned about:

https://www.sharpprints.com/

Backstage Headshot Print Service Forum:

https://www.backstage.com/forums/working-actor/best-cheapest-places-print-1507/

Resume Revamp Services:
@actorreboot
@problemsolvedbyjenna

Informational TikToks:
Headshots - https://www.tiktok.com/@jessiej_rae/video/7188238228854443310?_r=1&_t=8ZGrsH3yrk2
Equity Auditions - https://www.tiktok.com/@alymariemazzie/video/7189466466507312430?_t=8ZGrpdiQuGU&_r=1