The way something starts sets the tone for the continuation. Thus we make signs to eat in the Rosh Hashana Seder.
Once someone proposed a shidduch- match to a young bachur – Torah learner. He said – “ask me after Rosh Hashana – the new year. Because I didn’t pray to Hashem for a good shidduch last Rosh Hashana. I will pray on the new year so the prayer will be fulfilled and have an effect on the shidduch. “