Reply to Mixing tips?

Hey guys.

I've been muddling around with all my gear for a while now and am getting a good grip on things. I wanna bring out my first and second mixes within the next 5 weeks or so.

Mid year uni break is coming up and I wanna make a 1 hour long mix during that then afterwards either a 3 or 5 hour long mix.

BTW I have Traktor pro, (A2DJ + h/phones), DJ-tech I-mix club edition midi mixer.

The specifics are that I like to play stuff like electro house, house, and 'typical mainstream dance music.' You know, stuff you'd expect to hear in evening clubs with a little extra. And that's the kind of thing I want to practice; creating a mix for a more or less general evening club audience, which would incorporate those genres.

I read the recent mixing thread which was about dubstep, but I'm assuming the rules differ for mix making between audiences and genres.

Genres: Electro, club/dance, R&B?
Audience: Nightclub-goers +/or house party animals.

I'm believeing at the moment that for a (3-)5 hour long mix:
-To begin with, stuff needs to be low energy and fun. More of a background kind of music. Also to have a couple of medium energy songs in there to keep it interesting. Maybe some sing-a-longs for tipsy people.
-In the middle should be some popular songs that aren't too new or too high energy, but enough to go out and begin dancing to. Should last less than an hour in a 5 hour mix?
-It'd be cool to have a long song where you could kind of detect that the high energy stuff was about to start, like an indication of when 'shits about to get real,' after a song that was slightly higher energy than the previous medium energy stuff.
-Once shit's got real, blast them the fuck away with awesome drops and effects and keep them fluctuating in energy only slightly over the duration, but with the energy cutting back every 5 or so songs (Thanks Jester ) for a few minutes to let people go do something else for a few minutes if they choose to. Keep that going for hours.
-Try to throw in a few R&B songs in the last couple of hours? I don't know if I could live without dirty dancing and this is what R&B would be for. Although I've seen advice against mixing such different genres. I reckon it would be cool to do although I'm not sure how I'd manage it?

I'm pretty excited to get this down, get these up and get some feedback on them so I have a starter base for a DJing career (:

Just keen for a few words of wisdom before I get on my merry way :P

Thanks.

-Alex.