thorough beats...

I was wondering what do most people consider to be a complete track. a lot of tracks that i've been doing lately sound real empty. besides drums, the freaked sample, some percussion and brass, what use could i do? i don't wanna over do it? please add-on...

When I think something is missing I always throw in a sub bass or 808, or/and, add one percussive element (ex: a tambourine shot once per 4 bars).

yeah, i feel ya, but that ain't it. i've been doing that, but still... it just sounds kinda cheesy. maybe i need to blend some samples together...

Some breaks, bridges and fills would be cool if things change up every now and then.

Different sequences that mutate from the main sequence.

A chorus that goes good with but sounds nothing like the main sequence.

Try sampling or chopping a sound that's not a drumhit or a note or anything. Sometimes when i chop up some loops, and i use too many zones, i get short sounds that are very good by accident.
For instance, just some air and hiss, or maybe just the reverb tail from some bigger sound.
It doesn't sound like you can use them at all at first, but when you've got an empty track like that you can fill it up a bit with those sounds.

thx...this is actually a pretty good tip..

What I do with my tracks, if there's not a lot going on, is I make sure that all of the sounds fit well into frequency 'niches'. IE: filter and EQ all the drums before loading em into a sampler, and filter my synthesizers so that everything fits well together in the spectrum. If the sounds aren't clashing, frequency-wise, then the whole sound definately becomes much fuller than the sum of the parts. If you're using a computer, a spectral analyzer plug-in can be incredibly helpful. I also use little hi-end things like percussion, shakers, atmospheric noises, most anything above 3k, to give some 'sparkle' and 'life' to a track. What DoveSki said about the Sub-bass works well too for some 'oomph' in the low end, and if all else fails, try distortion on a few sounds, to add some character and grit.

rep

I like to layer my stuff - I tend to have multiple tracks of unique sounds - not necessarily playing at the same time, but working with or around each other. It takes a lot of time to get it right, otherwise it becomes messy. Most of my songs comprise of between 30 - 40 individual tracks, each track with a unique sound on it.

It's a bit like the way Shadow worked on Entroducing (I wish it sounded the same though!... )

I usually have a lot of sounds that I slip in the track to create a certain vibe; sounds that wouldn't work well alone but sound great in the mix. They make the track have "feeling" if I can put it that way. Also, I think it depends on the style of music that you're making. Sometimes it's good to leave room on the track. You have to give consideration for the vocals if there will be vocals on it. If you're listening to a track that will have singing, it may sound a little empty before the vocals have been added. That's my story.