need ideas

I just formed a band with my buddies a month ago and we're having a little trouble breaking away from the blues when we're writing.

I could use a little help with a song I'm working on, I can write melodies an licks but I'm horrible with harmonies. I'd like something with a bit of a punky garage rock sound too it. I've plan for it to be in a and I have a few chords that have worked well for me but I have a difficult time deciding where to place them and what else to use

A Bm E7 Dmaj7

dont rush your song writing, just play and it will come to you.

Look at a song in a genre you want to play, take some licks from it, put them in different keys, reverse them, smash them together, whatever. That's what I try to do when writing, I've come up with some really cool stuff that way.