Collaborative or Silo?
Collaborative trees, ie don't create duplicates - co-operate
WikiTree - great privacy controls, DNA friendly. Make sure to record your sources - NOT just someone's family tree on the web.
FamilySearch - great source records to go with the extensive tree
Companion tools:
Puzilla - great for illustrating holes in your tree on FamilySearch
Relative Finder
Silo trees: fully under your own control
Related blog posts
- Answers to Geni Skeptic by E Randol Schoenberg. Although I'm not a great fan of Geni as I much prefer WikiTree, some of the general points made do apply also to WikiTree, and some are downright funny
- The Advantages of Working with a One World Tree by Kitty Cooper