You have three things that compete for space in the mix.
1.) Volume - The most tempting to adjust for a quick fix.
2.) Tone/Frequency - Takes a bit more time to get right.
3.) Time - Harder to manipulate as you need to play what needs to be played but finding the right spots to play can help.
I would say the most important place to start is tone. This can be a collaborative effort between you and your band mates. Depending on the music, you may find your guitarist wanting a full range, monster stacked sound that is taking up most the frequency space. Hi mids is a good place to start. If that before mentioned is the case, see if they will slightly cut their mids in the 500-700hz range while you boost in the same range. Technique also helps here. I hate using a pick and never do so cutting in the mix is a bit tougher, but if you're into pics, go for it. It will help add a bit more bite to you're attack. Slight overdrive in your tone, think Ampeg tube distortion. Not a lot, just enough where it just starts to break up can help set your instrument apart in the mix.
Besides the guitar, you also need to look at other instruments that share your frequency range. The relationship between you and the kick can be very important. Both should be heard and present in the mix, but a good compliment to each other makes for a nice sound. Kick likes to sit in that 80hz spot so make sure you're not taking up too much of that space. A slight roll off at 80hz on your bass can help with that.
Once you have all your frequencies dialed in, then look at your volume and adjust accordingly.
These are just suggestions and every mix will be different, but as you get familiar with the songs that do and your band mates and can collective work on sharing the sonic space, your mix will be that much better because of it. Something profound to remember, what your instrument sounds like solo, is not what it should sound like in the mix, nor will it. In a full band scenario, there is just too much sonic competition for everyone to have full range access to all of the frequencies.
And if none of that works, check out
Zombie Tools.
Just my humble thoughts on the subject.