Farming comment karma can be easier in subreddits like r/AskReddit, r/memes, r/funny, or r/aww, as they tend to have high engagement. Focus on contributing thoughtful or humorous comments that fit the tone of the subreddit. For example, answer open-ended questions in r/AskReddit or add clever captions in meme-related subs. Timing matters too, post in trending or hot threads for visibility. Just remember to avoid spamming or low-effort comments, as Redditors catch on quickly!