A chronology of time travel
Here is the best timey-wimey order for watching Doctor Who, The Sarah Jane Adventures, Torchwood & and all the other spin-offs, extras and serials.
This list is not canonical but does list those episodes considered to be canon in the appropriate order.
And don't forget to watch these in order as well:
7x13 prequal - bbc.in/13vjLy6
"Strax Field Report: A Glorious Day is Almost Upon Us"
-Strax delivers a field report about events that will unfold in The Name of the Doctor.
7x13 prequal - bbc.in/18bggDW
"Strax Field Report: The Doctor's Greatest Secret"
-Strax reveals more.
8x08 sequel - youtu.be/h-OTYT02W7E
"Don't Stop me Now"
-Music video by Foxes
Please let me know if something is missing or you believe is in the wrong order.
This is a timeline of all things "Who". This is the best way to watch 50 years of Who, however if you prefer to jump ahead to the New Series then begin with #51, and you can remove any additional spinoffs if you fancy yourself a purist. The timeline is by no means definitive but I have consulted a variety of sources for its accuracy and canonical merit. Please comment on any changes you might suggest.
Doctor Who (1963) + Specials & Extras
K9 & Company (1981) Spinoff
Wartime (1987) Spinoff
P.R.O.B.E. (1994) Spinoff
Shakedown: Return of the Sontarans (1994) Spinoff
Downtime (1995) Spinoff
Auton Trilogy (1997-99) Spinoff
Daemos Rising (2004) Spinoff
Doctor Who Movie (1996)
Doctor Who Webcasts (2002-03)
Doctor Who (2005) All Episodes, Specials, Webisodes, Tardisodes, Prequels, and Mini-Episodes
Torchwood (2006) Spinoff & Webisodes
Sarah Jane Adventures (2007) Spinoff & Specials
K-9 (2009) Spinoff