I find that rotating through the various OTC decongestants each day helps as my body seems to adjust to them after a day or so and they lose effectiveness. Sudafed (the real stuff that you need to show ID to get) works the best.
At night anything with diphenhydramine (Benadryl) to knock me out works, but I only take a 1/4 to 1/2 a normal adult dose or I am woozy and useless the next day.