A combination of words may be trademarked but that does not protect the words individually. "Lean" or "startup." The focus of trademark law is not protecting the creative work of the owner but protecting consumers- preventing the likelihood of confusion with other recognized products on the market.

Whether or not your material would infringe copyright would depend on whether or not you expressed ideas similarly ( not just having similar ideas).

If you have Tm or copyright questions fell free to call me for a consult.