Play Casino Craps

In the casino game Craps, is there an easy way to remember what the payments are for your free-odds bets (on the pass-line), so you don’t have to do the math according to the ratios all the time?

What are the things that work to your detriment?
Does it matter if you end your weekend with winnings or a loss?
If you only play conservatively/the pass line with odds, are you worth a free hotel nights to the casino?
What other tips are out there?