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>>>...Which of these need to be done?...>>>

First of all, try doing nothing. Almost all beginners add way too much reverb, way too much compression, etc. I think we all make this mistake at first. I certainly have. My general guideline for any effect goes like this, kinda:

1. Add the effect until it is obvious.
2. Back the effect off until it cannot be heard anymore.
3. Slide the effect up very slightly so that I can just barely detect it.
4. Resist the temptation to add more.

...if you have enough reverb to cause your friends to say "Dude! Nice reverb!" its too much.

Also try doing the steps in different order. If you add reverb first and compression later the result will be very different from adding compression first and reverb later.

Take frequent breaks. The human ear is easily fatigued. Mix and master for a while, then go do something else, then come back in a couple hours. Keep your ears fresh.

Flatfoot sez: Call me when 'Talent-in-a-Box' is ready to ship! -- [8{>

Got some tunes on You Tube:
http://www.youtube.com/user/flatfoot50
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http://jdwolfe0.wixsite.com/learnbiab