How exactly does a second job work, scheduling wise?

I need to get a second job because my main job is only giving me 9-17 hours, and I need way more to help me pay for school and stuff, but I don't want to lose the benefits from my main job. How do I prevent scheduling overlaps? My current job gives me my schedule 3 weeks in advance, would I then give that schedule to the people at my other job? Also,what's a good second job? I'm working at Macy's right now making about 70-100 a week. I need to be making at least 300 a week. A friend told me that being a pharmacy technician's a good job for college kids. Any advice?

A brand new, uncertified tech will make no more than $9 per hour. A new certified tech will make about $10 per hour.

Your main job right now is to be a student.

You could work from home. Click on my avatar to see some info about a good at-home job. Feel free to email me!

First off - there are only 168 hours available in a week.

Second: an employee works in the highest tax bracket.

You need to spend some time learning how business works....because 168 hours a week is all we get.....

Read: Rich Dad, Poor Dad by Robert Kiyosaki.

Think about building a business of your own for long-term security.

Good Luck! (Labour Under Correct Knowledge)