1. Placement
2. Setup layout priority for routing
3. Keep ground current loop small as possible
4. Minimize parasitic inductance introduced by excess trace lead...
5. Thermal and EMC/EMI consideration.
Don'y forget symetry, floorplan is (as usual) 70% of the job, interaction between TX PLL RX, connection to the pad... . Keep all the RF path as straight as possible in top metal. 45 degree. electromigration for inductor, especially in the PA or Driver.
Let me know if you want more information on a specific part: mixer, lna, divider,upcv ...