Perhaps another tip is just that new TMS Web Core projects in general benefit greatly from the use of Bootstrap to begin with. It is helpful that TMS Web Core recently started including a new project template specifically for Bootstrap. I frequently use this Bootstrap Cheatsheet as my go-to resource for looking up bootstrap classes. Are there any other good recommendations other than of course the Bootstrap site?
There are also other examples here in the Support Center such as here and here that relate to where Bootsrap can come in handy in TMS Web Core, in addition to the above post of course.