I usually do them in one go each day whenever I feel like it and have time. If you have a lot of review cards, stop going through and adding new material.
If you’re getting good at some card consider choosing Easy instead of Good. It will only push it forward in time by an additional 30%, but it can do much to get rid of easy cards since those extra 30% stack each time you press Easy.
If you have some cards you keep failing at, suspend some of them or convert them to “new” cards (Browse→(Select cards)→Edit→Reschedule…) and lower the limit on how many new cards you get per day to 2 for example (from the deck’s options dialog). Those cards that you keep failing at is usually the ones which take up the most time so it’s important to not have too many of them at once. Taking a few of them at a time also decreases the risk of mixing up cards a lot.