Ethereum Classic mining can be a rewarding and profitable activity, but it also requires some knowledge and skills to optimize your performance and avoid common mistakes. Here are some tips and tricks that can help you mine ETC more efficiently and effectively:

• Choose the right hardware for your budget and goals. Depending on your available resources and electricity costs, you may want to invest in a powerful GPU or an ASIC miner that can deliver higher hash rates and lower power consumption. You can compare different hardware options on websites like whattomine or asicminervalue.
• Keep your hardware cool and stable. Mining generates a lot of heat and stress on your hardware, which can affect its performance and lifespan. You should monitor the temperature, fan speed, and voltage of your hardware and adjust them accordingly. You can use software tools like MSI Afterburner or HWiNFO to do that. You should also ensure proper ventilation and cooling for your mining rig, such as using fans, air conditioners, or water cooling systems.
• Update your drivers and software regularly. Mining software and drivers are constantly being updated to improve compatibility, stability, and efficiency. You should always check for the latest versions of your mining software and drivers and install them as soon as possible. You can find the download links and instructions for each software on their websites or on the pool website.
• Choose a reliable and profitable mining pool. Mining pools are groups of miners who share their computing power and split the rewards. Joining a pool increases your chances of finding a block and reduces the variance of your income. However, not all pools are equal in terms of fees, payouts, security, and support. You should do some research and compare different pools before joining one. 
• Optimize your mining settings and parameters. Mining software allows you to tweak various settings and parameters affecting your mining performance and profitability. For example, you can adjust the intensity, overclocking, undervolting, memory timing, fan speed, etc. However, you should be careful not to overdo it or damage your hardware. You should always test your settings before applying them and monitor their impact on your hash rate, power consumption, temperature, etc.
• Keep track of your mining statistics and earnings. Mining pools usually provide a dashboard to check your hash rate, balance, payouts, shares, etc. You should regularly check your statistics and earnings to ensure everything is working properly, and you are getting paid correctly. You can also use online calculators or spreadsheets to estimate your profits and expenses based on your hash rate, power consumption, electricity costs, pool fees, etc.