I dont think, there are any major adjustments to be made, just because a tournament runs over two phases. If you can play multible day 1, and you really want to play that particular tournament, then maybe there is some argument for trying to not make it to day 2 with a really short stack. So if you are in that situation towards the end of day 1, maybe adobt a slightly more aggressive strategy to either increase your stack or bust, so you can play another day 1. You cant go to crazy with this though, because then you would just be spewing away EV.
There are also some multiflight tournaments, where everyone reaching day 2 is already in the money, and then the end of day 1 should be played like any other bubble. It can be annoying to have to come back and play day 2, if you have almost no chance of cashing. But if you are already in the money, this obviously does not apply. In that situation you could even choose to not show up for day 2 and just accept the min-cash, and this would still be better than busting near the end of day 1.