A common situation is that researches move slightly from their expertise area. In those cases, the tutorials for beginners are not suitable. A common doubt is "This is reasonable, I am sure but: will the reviewers complain?"
For example, when choosing a functional for DFT, or a basis set for an ab initio calculation, there are safe choices which are not the best ones in terms of accuracy/efficiency. Sometimes other choices require to give more detail and justification.
Taking the above in mind: what are key points to move from gas phase to surfaces? Programs, methods, number of layers below the surface, levels of accuracy, etc.