1) Determine what area you want to invest in. Large companies? Small ones? Foreign or US? Growth or value? Etc. This will drastically reduce your choices.
2) Sort by expenses. Find a few that have low expenses. You can't guarantee any fund will do better than another. Pretty much funds will track each other, thus the lower the expenses, the better off you will do. Thus, you are more likely to do better with a low expense fund. This isn't guaranteed, but you at least weight the dice in your gambling favor. Now you'll be left with a small handful of choices.
3) Check to see if any fund routinely underperforms. No fund can routinely outperform any given sector year after year. But a fund can routinely underperform a sector year after year. Ditch any of the bad apples. Again, you can't spot the good apples, but you can spot the bad ones. Now you are down to less than 5 choices.
4) From the rest, I'd just buy one that has its price down at the moment so you buy low.