What Can Time Travellers Do?

I will list fifteen answers to this question, then list the titles of twelve relevant works, all but one by Poul Anderson.

(i) Explore the future.
(ii) Influence the future.
(iii) Become involved in circular causality paradoxes.
(iv) Time travel back and forth within slower than light interstellar spaceships.
(v) Use modern knowledge to survive in the past.
(vi) Perish in the past because of lack of appropriate skills.
(vii) Raid and plunder through time under cover of recorded atrocities.
(viii) Try to change the past for good or ill.
(ix) Study and record past events in order to prevent temporal alterations.
(x) Wage war through time.
(xi) Escape from an imminent nuclear war.
(xii) Exile criminals to the past.
(xiii) Retire to a preferred earlier period.
(xiv) Trade through time.
(xv) If seriously ill, hope to benefit from future medicine.

The Time Machine
"Flight To Forever"
There Will Be Time
The Corridors Of Time
"The Little Monster"
"The Man Who Came Early"
"The Nest"
"Welcome"
The Time Patrol series
"Wildcat"
"My Object All Sublime"
"Time Heals"