You don't. The whole point of this game is to die, and die again; as the Time Goddess herself says at some point, it's the only way that Liam can get stronger
A typical play-through (for me):
1) I die to the cockatrice in first life, after making sure I use the first 30 days to build all stats to 30 or more (to unlock titles), while also taking time to unlock Magic and to get Soul Box to level 2
2) I live my next couple of lives until day 50 or 60, just about, always making sure I reach next levels for main stats. I don't even bother exploring: just temple work and guild quests, and succubus dungeon. Only when I have the full mind resistance title after dying four times in the succubus dungeon do I start exploring in the next lives. At that point, I'll stretch my lifetimes to around day 100
3) etc.