1.You want to make sure that you feed your fish daily. Once or twice a day (As much food as they can eat in 3-5 minutes)
2. Check the temperature of the water daily to make sure it is suitable for the species you have chosen. If you have a heater this temperature will remain fairly constant.
3. Check the pH weekly.
4. Remove dead leaves from your plants as necessary, and check for proper water filtration.
5. Once a month do a partial water change 20-30%
6. Clean the algae from the tank sides and rocks monthly
7. Clean your filter monthly, if you have 2 filters it is a good idea to change them one at a time so that the bacteria levels remain constant and do not plummet.
Once you have your tank up and running if setup properly it will pretty much run itself. With consistent cleaning and the right types of fish, debris and algae will be minimal. Make sure that you have bottom feeders and algae eaters to help you out in the cleaning process. Good luck to you and your new aquarium!