There's something to be said about getting paid for each hour you're on the job. This might not be true however, if you worked for Walmart!
Your benefits package can sometimes be more important than your salary, and sometimes the soft benefits are even more important than the ones you can value in terms of $$$.
Ranked in order of importance for most people...
1) Health insurance
2) Vacation and sick days
3) Retirement plans, the most common being a 401k
4) Others ie., Flexible spending accounts, parking.
You should look these up, they're quite complex. There are literally millions of 401k plans out there which are pretty lousy.
Kuan