I recently gave a lecture on the topic of trademark prosecution before the USPTO for non-IP practitioner. The presentation is geared towards attorneys who do not practice before the USPTO. The idea is to educate as to the process, and issue spot trademarks that might be problematic even before conducting a search, or making a filing. I would not recommend a non-IP practitioner to handle a trademark filing, but would recommend that they be educated about the process. This can help their clients understand the process prior to retaining IP counsel. You can access the slides here.
Why include a picture of Play-doh, you ask? Because it recently trademarked the "scent of a sweet, slightly musky, vanilla fragrance, with slight overtones of cherry, combined with the smell of a salted, wheat-based dough" (a scent? trademarked? why, yes, it's possible). And if you have kids, you know what I am talking about - you either love it or hate it.