TTC health questions

Kat • I am a Texan abroad with my sweet hubby and a beautiful 19 month old daughter and trying to conceive our second child.
So how far have you gone with getting healthy while TTC? Do you still have one beer at night before a positive pregnant test? Do you stop caffeine before trying? I was so intense with my health on our first baby and I have been so lax with TTC our second but am starting to feel guilty. What do you think?