Spend some time searching and reading the forums.

Come up with a budget.

Come up with a list of things you're considering.

Explain what sort of riding you plan to do on the bike.

THEN ask for advice.

This is something that gets talked about endlessly and chances are you can find what you need with the search function alone.

One good thing to do would be to look at the stickied "post your bike" thread to get some inspiration for your build.

At some point, someone will tell you to just get a kilo tt. This is perfectly normal.