Shrove comes from the old Anglo-Saxon of shriven: to "present oneself to a priest for confession, penance, and absolution." (dictionary.com).
Ideally you should get to Confession during Lent. It is the one time of the year when Catholics are honour-bound to Confess, so that we may prepare ourselves for Easter.
Of course Lent is a wonderful time to gain many graces (for oneself, one's family, sinners, separated brethren souls in purgatory etc.) through fasting and abstinence.
We should also remember alms giving, especially to the poor. Whilst we should always be mindful of alms giving, it is vitally important in Lent.
Being a Catholic is not only about "giving up" things, but also about "doing" things, the negative and the positive if you want to think in worldly terms.
So choose a good cause, preferably Catholic, preferably which will directly help the poor.
So through the Confessional, fasting, alms and Communion, we can help make this a wonderful season in the Church's year: for us and for others.