TLH is easy. Check your funds for any losses in specific lots. If you see any losses, exchange these lots (including all purchased within the last 30 days*) for a similar but not identical fund (for VTSAX I use VFIAX).
To use an example, say you have three lots of VTSAX, with cost basis $60, $65, and $70. Stock price drops $68. Exchange the third lot for VFIAX and capture $2 per share of losses. At this point, you just can't buy any VTSAX for 30 days after the sale.
This is an easy process that just requires occasional glances at your cost basis. Stocks are down a bit over the last few weeks, so you likely have a good opportunity to TLH at the moment. This could save you annually up to $3000 x your marginal tax bracket (for me it is over $700 per year).
*To avoid a wash sale, you cannot buy replacement shares within 30 days prior to or 30 days after a capital loss sale.